chƯƠng trÌnh hỘi nghỊ ễ ồ Đ ưở vÀ Đ ưở Đ ươ tÓm tẮt … · Đặng v ăn...

HHỘỘII NNGGHHỊỊ VVẬẬTT LLÝÝ LLÝÝ TTHHUUYYẾẾTT TTOOÀÀNN QQUUỐỐCC LLẦẦNN TTHHỨỨ 3366 The 36th National Conference on Theoretical Physics

Tp. Quy Nhn, 01 – 04/08/2011

CCHHƯƯƠƠNNGG TTRRÌÌNNHH HHỘỘII NNGGHHỊỊ VVÀÀ

TTÓÓMM TTẮẮTT BBÁÁOO CCÁÁOO

Viện Vật lý, Hà Nội

Trường Đại học Quy Nhơn

Hội ngh ị Vật lý lý thuy ết toàn qu ốc lần th ứ 36

2

HỘI NGHỊ VẬT LÝ LÝ THUYẾT TOÀN QUỐC LẦN THỨ 36

(Tp. Quy Nhơn, 01 – 04/8/2011)

Chủ tịch Hội nghị Nguy ễn Ái Vi ệt (VVL HN) Nguy ễn Hồng Anh (ĐHQN)

Ban Tổ chức Nguy ễn Hồng Quang (VVL HN), Trưởng ban Hoàng D ũng (ĐHQG Tp. HCM), Phó Trưởng ban Đoàn Minh Th ủy (ĐHQN), Phó Trưởng Ban Bạch Thành Công (ĐHKHTN HN) Trương Minh Đức (ĐHSP Huế) Phó Th ị Nguy ệt Hằng (ĐHBK HN) Lê Văn Hoàng (ĐHSP Tp. HCM) Đinh Xuân Khoa (ĐH Vinh) Đặng Văn Soa (ĐHSP HN) Lưu Th ị Kim Thanh (ĐHSP HN II) Cao Huy Thi ện (VVL Tp. HCM) Hoàng Anh Tu ấn (VVL HN)

Ban ch ương trình Trịnh Xuân Hoàng (VVL HN), Trưởng ban Nguy ễn Bá Ân (VVL HN) Nguy ễn Quang Báu (ĐHKHTN HN) Hồ Trung D ũng (VVL Tp. HCM) Phùng V ăn Đồng (VVL HN) Võ Văn Hoàng (ĐHBK Tp. HCM) Vũ Văn Hùng (ĐHSP HN) Nguy ễn Quốc Khánh (ĐHKHTN Tp. HCM) Đỗ Hoàng S ơn (ĐHKHTN Tp. HCM) Vũ Ngọc Tước (ĐHBK HN)

TP. Quy Nh ơn 1-4/8/2011

3

Ban Tổ chức ñịa phương Đinh Thanh Đức (ĐHQN), Trưởng ban Đoàn Minh Th ủy (ĐHQN), Phó Trưởng Ban Nguy ễn Th ị Minh Ph ương (ĐHQN), Thư ký Mai Xuân Miên (ĐHQN)

Phụ trách biên t ập kỷ yếu Hội ngh ị Nguy ễn Toàn Th ắng (VVL HN)

Thư ký Hội ngh ị Đào Th ị Hồng (VVL HN)


4

Cơ quan t ổ chức Trung tâm V ật lý lý thuy ết, Viện Vật lý, Hà N ội Đại học Quy Nh ơn

Cơ quan tài tr ợ Trung tâm V ật lý lý thuy ết và Vi ện Vật lý, Hà N ội Đại học Quy Nh ơn Viện Khoa h ọc và Công ngh ệ Việt Nam

TP. Quy Nh ơn 1-4/8/2011

5

CHƯƠNG TRÌNH HỘI NGHỊ


6

Chương trình khung

Thời gian Thứ 2 1/8/2011

Thứ 3 2/8/2011

Thứ 4 3/8/2011

Thứ 5 4/8/2011

Andrey B. Arbuzov Đào Vọng Đức 08:30-10:00

Đăng ký ñại biểu (từ 8:00)

Khai mạc (9:30)

Trần Minh Ti ến Đoàn Trí Dũng

Nguyễn Văn Thành Lê Thanh Hải Phiên báo cáo treo 2

Nguy ễn Quê Hương Trần Công Phong Nguyễn Văn Hiếu

Đào Khắc An

10:00-10:30 Giải lao 1 Giải lao 3 Giải lao 4 Giải lao 6

10:30-11:40 Vũ Văn Hùng

Nguyễn Huy Việt Trần Nguyên Lân

V. O. Nesterenko Chia-Chu Chen Trần Minh Hiến

Nik. A. Tyurin Lê Viết Hòa

Hoàng Đỗ Ngọc Trầm

Đỗ Thị Hương Nguyễn Thanh Phong

Tổng kết

11:40-14:00

Nguy ễn Thế Toàn Nguyễn Phước Thể 14:00-15:30

Phiên báo cáo treo 1

S. N. Nedelko Nguyễn Quang Hưng

Nguyễn Thị Thúy Nguyễn Văn Long

15:30-16:00 Giải lao 2 Giải lao 5

16:00-17:00 Nguyễn Văn Chính

Chu Thùy Anh Nguyễn Thành Tiên

17:00-18:00

Gặp gỡ Quy Nhơn

18:00-20:00 Tiệc hội nghị

Tham quan

Tiệc hội nghị (buffet)

Thứ Hai, ngày 1 tháng 8 n ăm 2011

BUỔI SÁNG:

08:00 – 09:30 Đăng ký ñại bi ểu

09:30 – 10:00 Khai m ạc

10:00 – 10:30 Ngh ỉ giữa buổi, ch ụp ảnh l ưu ni ệm

10:30 – 11:40 Phiên báo cáo mi ệng

Chủ tọa: Nguy ễn Hồng Quang

10:30 - 11:00

Vu Van Hung, Application of the Statistical Moment Method to Thermodynamic and Mechanical Properties and EXAFS Cumulants of Bulk Materials and thin Films: Metals, Oxide Materials and Semiconductor Báo cáo mời Người trình bày: Vũ Văn Hùng (Đại học Sư phạm Hà Nội)

I-1

11:00 - Huy-Viet Nguyen, T. Anh Pham, Dario Rocca, Giulia O-1

TP. Quy Nh ơn 1-4/8/2011

7

11:20 Galli, Efficient GW Calculations using Eigenvalue-Eigenvector Decomposition of the Dielectric Matrix Người trình bày: Nguy ễn Huy Vi ệt (Viện Vật lý, Hà Nội)

11:20 - 11:40

Tran Nguyen Lan, Tran Hoang Hai, Monte Carlo Calculations on Magnetic Properties of Self-Assembled Nanochains Người trình bày: Trần Nguyên Lân (Viện Vật lý, TP Hồ Chí Minh)

O-2

BUỔI CHIỀU:

14:00 – 14:50 Phần trình bày báo cáo mi ệng

Chủ tọa: Tr ịnh Xuân Hoàng

14:00 - 14:30

Toan T Nguyen, SeIl Lee, Cathy V Tran, Tung T Le, Inhibition of DNA ejection from bacteriophage by Mg+2 counterions Báo cáo mời Người trình bày: Nguy ễn Thế Toàn (Georgia Institute of Technology, USA)

I-2

14:30 - 14:50

P. The Nguyen, V. Thanh Ngo, N. A. Viet, Effect of View's Angle on the Phase Transition in the Fishes Schooling System Người trình bày: Nguy ễn Phước Thể (Đại học Duy Tân, Đà Nẵng)

O-3

14:50 – 15:30 Phiên báo cáo treo 1

Chủ tọa: Tr ịnh Xuân Hoàng

Dao Vong Duc, Phan Hong Lien, Nguyen Quynh Lan, Generally Covariant Duality and Gravitational Scala r Fields Người trình bày: Dao Vong Duc

P-1

Nguyen Vien Tho, To Ba Ha, Dynamical behaviors of a field system admitting vortex solutions Người trình bày: Nguyen Vien Tho

P-2

Vo Van On, Some Interesting Properties of While Hole in the Vector Model for Gravitational Field Người trình bày: Vo Van On

P-3

Phan Hong Lien, Do Thi Hong Hai, The Electroweak Theory at finite Temperature and Density

P-4


8

Người trình bày: Do Thi Hong Hai

Luu Thi Kim Thanh, Tran Thai Hoa, On the q-Deformed Multimode Oscillators Người trình bày: Luu Thi Kim Thanh

P-5

P. V. Dong, H. N. Long, V. V. Vien, S_3 flavor Symmetry Extension of the Standard Model Người trình bày: Vo Van Vien

P-6

Nguyen Thi Ha Loan, Le Khac Quynh, The quantum statistics of R(q)-deformed crystal lattice vibrati on Người trình bày: Nguyen Thi Ha Loan

P-7

Vu Thi Thu Trang, Nguyen Dinh Dung, The nuclear Scattering of Polarized Neutrons on Surface of Crystal with Polarized Nucleus Người trình bày: Vu Thi Thu Trang

P-8

Bui Thi Hanh, Nguyen Thi Thuong, Quasi-Bound States of Dirac Fermions in Gate-Tunable Disk-Like Graphene Quantum Dots Người trình bày: Bui Thi Hanh

P-9

Tran Cong Phong, Le Dinh, Huynh Vinh Phuc, Magnetophonon and Cyclotron Resonances Line-widths in Cylindrical Quantum Wires Người trình bày: Huynh Vinh Phuc

P-10

Cao Huy Thien, Tran Thoai Duy Bao, Harmut Haug, Quantum kinetics of the polariton condensate in semiconductor microcavities Người trình bày: Cao Huy Thien

P-11

Le Thai Hung, Kim Thi Phuong, Luong Van Tung, Nguyen Quang Bau, The Parametric Transformation Coefficient Of Confined Acoustic Phonons And Confined Optical Phonons In The Cylindrical Quantum Wire With Infinite Potential Người trình bày: Kim Thi Phuong

P-12

Nguyen Van Nghia, Dinh Quoc Vuong, Nguyen Quang Bau, The Acoustomagnetoelectric Current of a Rectangular Quantum Wire with an Infinite Potential in the Presence of an External Magnetic Field Người trình bày: Nguyen Van Nghia

P-13

Do Manh Hung, The Influences of Confined Phonons on the Nonlinear Absorption Coefficient of a Strong Electromagnetic wave by Confined Electrons in Compositional Superlattices

P-14

TP. Quy Nh ơn 1-4/8/2011

9

Người trình bày: Do Manh Hung

Huynh Vinh Phuc, Le Dinh, Tran Cong Phong, Cyclotron Resonance Line-width Due to Electron-LO-phonon Interacting in Rectangular Quantum Wire Người trình bày: Huynh Vinh Phuc

P-15

Le Dinh, Tran Cong Phong, Influence of form Factor on Absorption Line-Widths in Quantum wells with Semi-Inverse-law Potential Người trình bày: Le Dinh

P-16

Le Thi Thu Phuong, Tran Cong Phong, Optically Detected Electron Energy Spectrum in Rectangular Quantum Wires Người trình bày: Le Thi Thu Phuong

P-17

Nguyen Duong Bo, Nguyen Hong Quang, The Coulomb Interaction for Electrons and Holes in Bilayer Parabolic Quantum Dots Người trình bày: Nguyen Duong Bo

P-18

Tran Nguyen Dung, Nguyen Manh Trinh, Effects of disorder and magnetic field on transport properties of Graphene nanoribbons Người trình bày: Tran Nguyen Dung

P-19

Nguyen Thi Thuong, Nguyen Manh Trinh, Transport Through Graphene p-n Junctions Người trình bày: Nguyen Thi Thuong

P-20

Le Thi Hong Lien, Vu Ngoc Tuoc, Nguyen Thi Thuong, Density Functional Tight Binding Study on ZnS Nano Wire Người trình bày: Le Thi Hong Lien

P-21

Nguyễn Văn Duy, Đỗ Vân Nam, Mô hình liên k ết lò xo ñàn hồi và ph ổ tán s ắc của phonon trong Graphene Người trình bày: Nguy ễn Văn Duy

P-22

P.T.K. Hang, T.A. Chu, N.L. Hoai, T.T.T. Van, N.A. Viet, On the Thermodynamic Equivalency between Noniteracting Bose and Fermi gas in Graphene Ribbons Người trình bày: Phan Thi Kim Hang

P-23

Bui Dinh Hoi, Nguyen Thu Huong, Nguyen Quang Bau, Influence of Laser Radiation on the Hall Effect in Quantum Wells with Parabolic Potential Người trình bày: Bui Dinh Hoi

P-24


10

Ho Khac Hieu, Nguyen Van Hung, Vu Van Hung, Lang Duc Sy, Vu Van Khai, Tong Sy Tien, Calculations of high order EXAFS cumulants of FCC crystals Người trình bày: Ho Khac Hieu

P-25

Vu Van Hung, Luu Thi Kim Thanh, Duong Dai Phuong, Application of q-Deformed Fermi- Dirac Statistics t o the Specific Heat Capacity of Free Elecirons of Metals Người trình bày: Duong Dai Phuong

P-26

Pham Dinh Tam, Pham Duy Tan, Nguyen Quang Hoc, Dang Thi Phuong Hai, Nguyen Thi Binh, Ordered Theory Of β- CuZn Alloy Người trình bày: Pham Dinh Tam

P-27

Pham Dinh Tam , Pham Duy Tan , Nguyen Quang Hoc , Le Hong Viet, Nguyen Hong Son, Study On Disordered Binary Alloy Người trình bày: Pham Dinh Tam

P-28

Võ Tình, Đặng Hữu Định, Khảo sát m ột số tính ch ất phi c ổ ñiển của các tr ạng thái phi c ổ ñiển Người trình bày: Đặng Hữu Định

P-29

Chu Van Bien, Numerical modeling of the intra-cavity stimulated Raman Scattering as a source of sub- nanosecond optical pulses Người trình bày: Chu Van Bien

P-30

Nguyen Thi Hien, Hoang Van Hung, Le Van Hoang, Possibility of Tracking Imino-Amino Tautomerism of Cytosine by Ultra-Short Laser Pulses using High-Order Harmonic Generation Người trình bày: Hoang Van Hung

P-31

P.T. Trang, N.T.H. Trang, T.T. Thao, N.V. Thanh, and N.A. Viet, Temperature and environmental services affect to some of thermodynamics of biological DNA pendulum Người trình bày: Nguyen Thi Huyen Trang

P-32

Lý Duy Nhất, Huỳnh Nguyễn Thanh Trúc, Nguyễn Văn Hoa, Nguyễn Phương Duy Anh, Lê Văn Hoàng, Phương pháp toán t ử FK cho bài toán nguyên t ử Hydro trong t ừ trường v ới cường ñộ bất kỳ Người trình bày: Lý Duy Nh ất, Huỳnh Nguy ễn Thanh Trúc

P-33

Bùi Nguyễn Ngọc Thúy, Nguyễn Đình Luật, Cao Hồ Thanh Xuân, Nguyễn Văn Hoa, Lê Văn Hoàng,

P-34

TP. Quy Nh ơn 1-4/8/2011

11

Phương pháp toán t ử FK gi ải ph ương trình Schrodinger cho nguyên t ử Hydro Người trình bày: Bùi Nguy ễn Ngọc Thúy, Nguy ễn Đình Lu ật,

Bui Van Hao, Nguyen Ngoc Khoa Truong, Tran The Nam, Nguyen Thi Minh Phuong, Doan Minh Thuy, The use of Drude-Lorentz model in determining resistivity of ultra-thin TiN films Người trình bày: Nguyen Ngoc Khoa Truong

P-35

LECONG Nhan, Femtosecond Supercontinua Generated in Birefringent Photonic Crystal Fibers Người trình bày: LECONG Nhan

P-36

Phan Ngoc Hung, Le Van Hoang, Hidden Symmetry and Runge-Lenz Vector for the Nine-Dimensional Micz-Kepler Problem Người trình bày: Phan Ngoc Hung

P-37

Thai Doan Thanh , Nguyen Tuan Anh, Trang Huynh Dang Khoa, The Effects of the Squeezed Field on the Dispersive and Absorptive Properties of a Three-Level Medium Người trình bày: Thai Doan Thanh

P-38

Ho Quang Quy, Mai Van Luu, Nguyen Thai Bang, Influence of the Fraction of Stokes and Anti-Stokes Intensities on Beam of Trio-Cavity Raman Laser Người trình bày: Ho Quang Quy

P-39

Huy N. V., Nhan N. T., Hoa N. T., Hung P.K., Molecular Dynamic Simulation of Amorphous SiO2 under Pressure Người trình bày: Nhan N.T.

P-40

Nhan N. T., Huy N. V, Hung. P. K., Study on Physical Properties of Nano Iron Người trình bày: Nhan N.T.

P-41

Nguyen Ba Hung , Trinh Xuan Hoang, Aggregation of short peptides in the tube model of proteins Người trình bày: Nguyen Ba Hung

P-42

Bui Phuong Thuy, Nguyen Thuy Nhung, Trinh Xuan Hoang, Molecular Dynamics simulation of cotranslational protein folding in a coarse-grained model Người trình bày: Bui Phuong Thuy

P-43

Trinh Xuan Hoang, Jayanth R. Banavar, Amos Maritan, P-44


12

Folding of thick Hydrophobic Membranes Người trình bày: Trinh Xuan Hoang

To Thi Thao, Ngo Van Thanh, Chu Thuy Anh, Nguyen Ai Viet, Molecular Dynamics Simulation the Function of Neuroglobin Người trình bày: To Thi Thao

P-45

D. T. Huong, N. L. Hoai, N. A. Viet, Pathology Model of HIV Infection with long-term Periodic Treatment Người trình bày: D. T. Huong

P-46

Ha Thanh Hung, Le Tho Hue, Hoang Ngoc Long, Ward-Takahashi Identity for Vertex Functions of Sqed Người trình bày: Ha Thanh Hung

P-47

15:30 – 16:00 Ngh ỉ giải lao


Chủ tọa: Hoàng Anh Tu ấn

16:00 - 16:20

Nguyen Thuy Trang, Nguyen Van Chinh, Bach Thanh Cong, Phan Thi Hong Ngat, Influence of size effects on structural phase transition and domain structure of ferroelectric nano-sized BaTiO3 rods Người trình bày: Nguy ễn Văn Chính (Đại học Khoa học Tự nhiên, Hà Nội)

O-4

16:20 - 16:40

T. A. Chu, D. H. Lien, N. A. Viet, Simple Model for the Distribution of Stock Market Indexes Người trình bày: Chu Thùy Anh (Viện Vật lý, Hà Nội)

O-5

16:40 - 17:00

Dinh Nhu Thao, Nguyen Thanh Tien, Electron Distribution in AlGaN/GaN Modulation-Doped Heterostructures Người trình bày: Nguy ễn Thành Tiên (Đại học Cần Thơ)

O-6

18:00 – 20:00 Tiệc Hội ngh ị

Thứ Ba, ngày 2 tháng 8 n ăm 2011

BUỔI SÁNG:


TP. Quy Nh ơn 1-4/8/2011

13

Chủ tọa: Vũ Văn Hùng

08:30 - 09:00

Tran Minh Tien, Topological Insulator: a Novel Quantum State of Matter Báo cáo mời Người trình bày: Trần Minh Ti ến (Viện Vật lý, Hà Nội)

I-3

09:00 - 09:20

Doan Tri Dung, Cao Huy Thien, Tran Thoai Duy Bao, Harmut Haug, Correlations of polariton condensate in Langevin equation approach Người trình bày: Đoàn Trí D ũng (Viện Vật lý, TP Hồ Chí Minh)

O-7

09:20 - 09:40

Nguyen Van Thanh, Nguyen Thi Nguyet Anh, Nguyen Anh Tuan, Geometric Structure, Electronic Structure, and Spin Transition of FeII Spin-crossover Molecules Người trình bày: Nguy ễn Văn Thành (Đại học Khoa học Tự nhiên, Hà Nội)

O-8

09:40 - 10:00

Nguyen Nhu Dat, Le Thanh Hai., Electron scattering rates by optical phonons in a circular semiconductor quantum wire with a metal cover. Người trình bày: Lê Thanh H ải (Đại học Xây Dựng Hà Nội)

O-9

10:00 – 10:30 Ngh ỉ giữa buổi


Chủ tọa: Lê Văn Hoàng

10:30 - 11:00

Nesterenko Valentin O, Novikov Aleksander N, Suraud Eric, Tunneling and Transport Dynamics of Trapped Bose-Einstein Condensates Báo cáo mời Người trình bày: Valentin O. Nesterenko (Joint Institute for Nuclear Research, Dubna)

I-4

11:00 - 11:20

Chia-Chu Chen, Chien Chih Chiu, The Damping Correction Derived from Electrons Scattering with Magnetization Người trình bày: Chia-Chu Chen (National Cheng-Kung University, Taiwan)

O-10

11:20 - 11:40

Tran Minh Hien, Ho Trung Dung, Dirk-Gunnar Welsch, Local-field correction in the strong-coupling regim e Người trình bày: Trần Minh Hi ến (Viện Vật lý, TP Hồ Chí Minh)

O-11


14

BUỔI CHIỀU: Tham quan

Thứ Tư, ngày 3 tháng 8 n ăm 2011

BUỔI SÁNG:


Chủ tọa: Hoàng Ng ọc Long

08:30 - 09:00

Andrey Arbuzov, High Precision Electroweak Physics at LHC: Drell-Yan Processes Báo cáo mời Người trình bày: Andrey Arbuzov (Joint Institute for Nuclear Research, Dubna)

I-5

09:00 - 09:20

Dao Vong Duc, Gauge Interaction with space-time Dependent Coupling Parameter Người trình bày: Đào Vọng Đức (Viện Vật lý, Hà Nội)

O-12

09:20 – 10:00 Phần trình bày báo cáo treo 2

Chủ tọa: Nguy ễn Như Đạt

Do Thu Trang, Nguyen Dinh Dung, Vector of Polarization of Scattering of Neutrons in Paramagnetic Crystal Người trình bày: Do Thu Trang

P-48

Nguyen Thanh Nga, Nguyen Dinh Dung, Magnetic Scattering of Polarized Neutrons and Polarized Vector of Scattering Neutrons in Ferromagnetic Crystals Người trình bày: Nguyen Thanh Nga

P-49

Pham Thi Thu Ha, Nguyen Dinh Dung, Polarized Vector of Scattering Neutrons in Crystal with Magnetic Helicoidal Structure Người trình bày: Pham Thi Thu Ha

P-50

D. V. Soa, D. L. Thuy, N. H. Thao, T .D. Tham, B. T. Giang, Radion Production at Compact Linear Collider based on gamma-Electron Collisions Người trình bày: D. V. Soa

P-51

TP. Quy Nh ơn 1-4/8/2011

15

D. L. Thuy, L. N. Thuc, T. D. Tham, B. H. Giang, Saxion mass in the SUSY Axion Model and Saxion Production in high Energy Collisions Người trình bày: L. N. Thuc

P-52

Nguyen Quang Hung, Dang Thi Dung, Tran Dinh Trong, Thermodynamic Pairing and its Influence on Nuclear Level Density Người trình bày: Dang Thi Dung

P-53

Thi Tran Anh Tu, Nguyen Huu Tung, Cao Huy Thien, Electron effective mass renormalization in high-photoexcited quantum wire with double plasmon-pole approximation Người trình bày: Thi Tran Anh Tu

P-54

Mai Hoang Linh Phi, Cao Huy Thien, Amplitude and phase dynamics of spin-degenerated polariton condensate in semiconductor microcavities Người trình bày: Mai Hoang Linh Phi

P-55

Nguyen Anh Tuan, Influence of Solvents on Spin Transition of FeII Spin-crossover Molecule Người trình bày: Nguyen Anh Tuan

P-56

Nguyen Tri Lan, The Hubbard - Stratonovich transformation and relevant order parameters Người trình bày: Nguyen Tri Lan

P-57

Vetpany Sivongxay, Nguyen Nhu Dat, Dielectric Function of a Semiconductor Quantum Wire Người trình bày: Vetpany Sivongxay

P-58

Pham Thi Thanh, Nguyen Toan Thang, Antiferromagnetic Heisenberg spin-½ model on a triangular lattice in a magnetic field Người trình bày: Pham Thi Thanh Nga

P-59

Pham Huong Thao, Bach Thanh Cong, Thermodynamic theory for few-atomic-layer ferromagnetic films Người trình bày: Pham Huong Thao

P-60

Nguyen Quoc Khanh, Mai Thanh Huyen, Transport Properties of a spin-polarized Quasi-two-Dimensional Electron gas in an InP/In_1-xGa_xAs/InP Quantum well Including Temperature and Correlation Effects Người trình bày: Mai Thanh Huyen

P-61

Nguyen Quoc Khanh, Mai Thanh Huyen, Coulomb P-62


16

Drag Resistivity in Bilayer 2D hole Systems Người trình bày: Mai Thanh Huyen

Nguyen Thi Thanh Nhan, Le Thi Luyen, Nguyen Vu Nhan, Nguyen Quang Bau, Influence of Laser Radiation on the Absorption of a Weak Electromagnetic Wave by Confined Electrons in Doped Superlattices Người trình bày: Nguyen Thi Thanh Nhan

P-63

Nguyen Dinh Nam, Nguyen Thi Quyen, Le Thi Thu Phuong, Nguyen Vu Nhan, Dinh Quoc Vuong, Nguyen Quang Bau, The Amplification of Confined Sound (Confined Acoustic Phonons) by Absorption of Laser Radiation in a Cylindrical Quantum Wire with an Infinite Potential Người trình bày: Nguyen Dinh Nam

P-64

Le Thai Hung, Duong Thi Lan, Nguyen Thi Thu Hien, Nguyen Thi Thanh Nhan, Nguyen Quang Bau, The Influences of Confined Phonons on The Nonlinear Absorption Coefficient of a Strong Electronmagnetic Wave by Confined Electrons in Cylindrical Quantum Wires with the parabolic holes. Người trình bày: Nguyen Thi Thu Hien

P-65

Le Duc Anh, Hoang Anh Tuan, Mott-Hubbard transitions in the two-band Hubbard model: A coherent potential approximation study Người trình bày: Le Duc Anh

P-66

Nguyen Thanh Tien, Dinh Nhu Thao, Individual Deduction of two roughness Parameters for Quantum wells from Intersubband Absorption peak data Người trình bày: Nguyen Thanh Tien

P-67

Vu Kim Thai, Le Duc Anh, Hoang Anh Tuan, Effect of the Direct Exchange Interaction between Magnetic Impurities on Magnetization in Diluted Magnetic semiconductors Người trình bày: Vu Kim Thai

P-68

Vu Kim Thai, Le Duc Anh, Hoang Anh Tuan, Curie Temperature of Diluted Magnetic Semiconductors: the Fluence of the Antiferromagnetic Exchange Interaction between Magnetic Impurities Người trình bày: Vu Kim Thai

P-69

Luong Van Tung, Parametric Resonance of Acoustic P-70

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and Optical Phonons in a Compositional Semiconductor SuperLattice Người trình bày: Luong Van Tung

Nguyen Quang Hoc, Hoang Van Tich, Nguyen Duc Hien, Study on Mechanical and Thermodynamic Property of Molecular Cryocrystals CO2 and N2O under Pressure Người trình bày: Nguyen Duc Hien

P-71

Phan Thi Thanh Hong, Vu Van Hung, Boron and Phosphorus Diffusion in Silicon: Pressure Dependence Người trình bày: Phan Thi Thanh Hong

P-72

Nguyen Van Hung, Tong Sy Tien, Le Hai Hung, Calculation of Physical Parameters of real Atomic Vibration of fcc Crystals Doped by Atoms of other Crystals using Effective Potential Người trình bày: Tong Sy Tien

P-73

Nguyen Bao Trung, Nguyen Van Hung, Nguyen Cong Toan, Calculation of XAFS Cumulants of bcc Crystals based on Anharmonic correlated Debye Model Người trình bày: Nguyen Bao Trung

P-74

Nguyen Van Hop, Entanglement Dynamics of the Independent Cavity-qubit System Người trình bày: Nguyen Van Hop

P-75

Phan Thanh Hai, Doan Minh Thuy, Klaus Wandelt, Adsorption Structures of Halide Anions and Porphyrins on a Copper Electrode Studied by in Situ Scanning Tunneling Microscopy Người trình bày: Doan Minh Thuy

P-76

Le Thi Truc Phuong, Phan Minh Truong, Ho Trung Dung, Entanglement in Fermi gas and BCS systems Người trình bày: Phan Minh Truong

P-77

Do Phuong Lien Nguyen Tuan Anh, Nguyen Anh Tuan, Magnetic field dependence of magnetic Casimir effect (MCE) Người trình bày: Do Phuong Lien & Nguyen Anh Tuan

P-78

Võ Trung Kiên, Nguyễn Huỳnh Tuấn Anh, Khảo sát ảnh h ưởng c ủa kích th ước lê tính ch ất vòng c ộng hưởng h ở Người trình bày: Vo Trung Kien

P-79


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Truong Minh Duc, Tran Quang Dat, Nguyen Ba An, Controlled Teleportaion via Trio Coherent States Người trình bày: Tran Quang Dat

P-80

Truong Minh Duc, Nguyen Thi Xuan Hoai, Nguyen Ba An, Higher-Order Nonclasical Properties of two-Mode Photon-Added Displaced Squeezed States Người trình bày: Nguyen Thi Xuan Hoai

P-81

Ho Quang Quy, Hoang Dinh Hai, Doan Hoai Son, Chu Van Lanh, Influence of Principle Parameters on the Average Stiffness of Optical Tweezer using Pulsed Gaussian Beams Người trình bày: Ho Quang Quy

P-82

Le Quy Giang, Nguyen Thi Man, Hoang Do Ngoc Tram, Le Van Hoang, The FK Operator Method for Exact Numerical Solutions of Schrodinger Equation of Two-Dimensional Negative Exciton Người trình bày: Hoang Do Ngoc Tram

P-83

Nguyen Van Hoa, Ho Quang Quy, Bistability Characteristics of the Reflected signal through a Symetric Nonlinear Michelson Interferometer Người trình bày: Nguyen Van Hoa

P-84

Hoang Van Hung, Tran Trieu Phu, Le Van Hoang, The TDSE Method for Calculation of High-Order Harmonic Spectra of a One-Dimensional Atom with Soft-Coulomb Potential Người trình bày: Hoang Van Hung

P-85

Nguyen Ba An, Cao Thi Bich, Nung Van Don, Joint Remote Preparation of Four-Qubit Cluster-Type States Revisited Người trình bày: Cao Thi Bich

P-86

Nguyen Viet Huy, Le Van Vinh, Pham Khac Hung, Molecular dynamic simulation of FeNi nano materials Người trình bày: Nguyen Viet Huy

P-87

Nguyen Thi Thanh Ha, Nguyen Thi Hien, Pham Khac Hung, Tracer-diffusion mechanism in amorphous iron Người trình bày: Nguyen Thi Thanh Ha

P-88

Trinh Van Mung, Nguyen Van Hong, Pham Khac Hung, Studying the Diffusion of Particles on Energeticall y Disordered Lattices Using Monte-Carlo Simulation and Analytical Method

P-89

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19

Người trình bày: Nguyen Van Hong

V. T. H. My, C. T. Anh, T. T. T. Van, N. V. Thanh, N. A. Viet, Examine the Information Behavior of DNA near the melting phase Transition Point Người trình bày: Vy Thi Ha My

P-90

Bui Duc Tinh, Dingping Li, Baruch Rosenstein, Resistivity Beyond Linear Response in Layered Superconductors under Magnetic Field Người trình bày: Bui Duc Tinh

P-91

Phan Hoàng Chương, Nghi ệm ph ương trình truy ền nhi ệt Chaos v ới nguyên ph ụ thu ộc th ời gian Người trình bày: Phan Hoàng Ch ương

P-92

Nguyen Tien Dung, Pham Van Trong, Nguyen Van Thinh, Mai Van Dung, Dinh Xuan Khoa, Vu Ngoc Sau, Nguyen Huy Bang, First Rotational Spectroscopic Observation for the 21 П State in NaLi Người trình bày: Dinh Xuan Khoa

P-93

10:00 -10:30 Ngh ỉ giải lao

10:30 -11:40 Phiên báo cáo mi ệng

Chủ tọa: Đinh Xuân Khoa

10:30 - 11:00

Nikolay A. Tyurin, Algebraic Lagrangian Geometry: from Geometric Quantization to Mirror Symmetry Báo cáo mời Người trình bày: Nikolay A. Tyurin (Joint Institute for Nuclear Research, Dubna)

I-6

11:00 - 11:20

Tran Huu Phat, Le Viet Hoa, Nguyen Tuan Anh, Nguyen Van Long, Nguyen Chinh Cuong, On a Phase Transition of Bose Gas Người trình bày: Lê Viết Hòa (Đại học Sư phạm Hà Nội)

O-13

11:20 - 11:40

Hoang Do Ngoc Tram, Le Van Hoang, The free Parameter in Regulation of Convergence Rate of the FK Operator Method for Exact Numerical Solutions of the Schrodinger Equation Người trình bày: Hoàng Đỗ Ngọc Trầm (Đại học Sư phạm TP Hồ Chí Minh)

O-14

BUỔI CHIỀU:


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Chủ tọa: Đào Vọng Đức

14:00 - 14:30

Sergei N. Nedelko, Gluon condensation, Weyl reflections, CP: confinement, chiral symmetry and hadronization Báo cáo mời Người trình bày: Sergei N. Nedelko (Joint Institute for Nuclear Research, Dubna)

I-7

14:30 - 14:50

Nguyen Quang Hung, Microscopic Description of Nuclear Thermodynamic Properties Người trình bày: Nguy ễn Quang H ưng (Đại học Tân Tạo)

O-15

14:50 - 15:10

Nguyen Thi Thuy, Do Thi Huong, Hoang Ngoc Long, Dark matter in the economical 3-3-1 model Người trình bày: Nguy ễn Th ị Thúy (Viện Vật lý, Hà Nội)

O-16

15:10 - 15:30

Tran Huu Phat, Nguyen Van Long, Nguyen Van Thu, Neutrality Effects on the Phase Structure of the Linear Sigma Model with the Non-Standard Symmetry Breaking Term Người trình bày: Nguy ễn Văn Long (Trường Cao ñẳng Sư phạm Gia Lai)

O-17

15:30 – 16:00 Ngh ỉ giải lao

16:00 – 18:00 Gặp gỡ Quy Nh ơn

- Lễ trao giải thưởng Nghiên cứu trẻ năm 2011 của Hội VLLT (10 phút)

- Tổng kết của BCH về công tác Hội trong thời gian qua, góp ý của các hội viên (20 phút)

- Giới thiệu và trao ñổi hợp tác của các ñồng nghiệp từ Phòng Vật lý lý thuyết, Viện Dubna (BLTP, JINR, Russia) (30 phút)

- Bài nói chuyện về "Đất nước, con người Bình Định" của Ông Nguyễn Đình Hoãn, Sở Văn hóa, Thể thao và Du lịch Bình Định (60 phút)

18:00 – 20:00 Liên hoan

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Thứ Năm, ngày 4 tháng 8 n ăm 2011

BUỔI SÁNG:


Chủ tọa: Nguy ễn Quang Báu

08:30 - 09:00

Nguyen Que Huong, Hybrid Exciton in Semiconductor-Organic Quantum Dot Systems Báo cáo mời Người trình bày: Nguy ễn Quê Hương (Marshall University, USA)

I-8

09:00 - 09:20

Tran Cong Phong, Luong Van Tung, Vo Thanh Lam, A new method to determine experimentally the impurity concentration in n-i-p-i superlattices Người trình bày: Trần Công Phong (Đại học Huế)

O-18

09:20 - 09:40

Nguyen Quang Bau, Nguyen Van Hieu, Quantum Theory of the Acoustoelectric Effect in a Quantum Well Người trình bày: Nguy ễn Văn Hiếu (Đại học Đà Nẵng)

O-19

09:40 - 10:00

Phan Anh Tuan, Nguyen Tien Dai, Dao Duc Khang, Dao Khac An, Some results of the nanowires growth on GaAs semiconductor substrate by VLS method: the growth mechanisms and abnormal phenomena Người trình bày: Đào Kh ắc An (Viện Khoa học Vật liệu, Hà Nội)

O-20

10:00 – 10:30 Ngh ỉ giữa buổi


Chủ tọa: Phùng V ăn Đồng

10:30 - 11:00

D. T. Huong, CP Violation Báo cáo mời Người trình bày: Đỗ Thị Hương (Viện Vật lý, Hà Nội)

I-9

11:00 - 11:20

Nguyen Thanh Phong, S4 Symmetry and Radiatively Generated Leptogenesis Người trình bày: Nguy ễn Thanh Phong (Đại học Cần Thơ)

O-21

11:20 – 12:00 Tổng k ết Hội ngh ị


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TÓM TẮT BÁO CÁO


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HỘI NGHỊ VẬT LÝ LÝ THUYẾT TOÀN QUỐC LẦN THỨ 36 (Tp. Quy Nhơn, 01 – 04/8/2011)

I-1. Application of the Statistical Moment Method to The rmodynamic and Mechanical Properties and EXAFS Cumulants of Bu lk Materials and thin Films: Metals, Oxide Materials a nd Semiconductor

Vu Van Hung

Hanoi National University of Education, 136 Xuan Thuy Str., Hanoi, Vietnam

The systems considered at high temperatures and high pressures require the allowance for anharmonic effects which are very essential in these regions. The anharmonic effects of lattice vibrations and high pressures and size on the thermodynamic and mechanical properties and EXAFS cumulants of the bulk materials and thin films (like as metals, oxide materials and semiconductors) have also been studied by the statistical moment method (SMM). In the present report, we use the finite- temperature moment expansion technique to derive the free energies and equation of states of bulk materials and thin films. The thermodynamic quantities, elastic moduli and elastic constants and EXAFS cumulants are determined. We discusss the temperature, pressure and size dependences of thermodynamic and elastic properties of bulk materials and thin films and compare the SMM calculations with those of the experimental results and other theories.

I-2. Inhibition of DNA ejection from bac teriophage by Mg+2 counterions

Toan T Nguyen, SeIl Lee, Cathy V Tran, Tung T Le

Georgia Institute of Technology

The problem of inhibiting viral DNA ejection from bacteriophages by multivalent counterions, specifically Mg+2 counterions, is studied. Experimentally, it is known that MgSO4 salt has a strong and non-monotonic effect on the amount of DNA ejected. There exists an optimal concentration at which the minimum amount of DNA is ejected from the virus. At lower or higher concentrations, more DNA is ejected from the capsid. We propose that this phenomenon is the result of DNA overcharging by Mg+2 multivalent counterions. As Mg+2 concentration increases from zero, the net charge of DNA changes from negative to positive. The optimal inhibition corresponds to the Mg+2 concentration where DNA is neutral. At lower/higher concentrations, DNA genome is charged. It prefers to be in solution

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to lower its electrostatic self-energy, which consequently leads to an increase in DNA ejection. By fitting our theory to available experimental data, the strength of DNA-DNA short range attraction energies, mediated by Mg+2, is found to be -.004 kBT per nucleotide base. This and other fitted parameters agree well with known values from other experiments and computer simulations. The parameters are also in agreement qualitatively with values for tri- and tetra-valent counterions.

I-3. Topological Insulator: a Novel Quantum State o f Matter

Tran Minh Tien

Institute of Physics, VAST

In this talk we will present the recent developments of topological insulator, a novel quantum state of matter. The topological insulators like the conventional insulators have the energy gap in bulk, but their surface or edge states are gapless. We will focus on the physical properties of a magnetic impurity embedded on the surface of a topological insulator. It is shown that the physical properties are quite different from the counterpart of the conventional surface of gapless states. We will also discuss on the Kondo topological insulator.

I-4. Tunneling and Transport Dynamics of Trapped Bo se-Einstein Condensates

Nesterenko Valentin O (1), Novikov Aleksander N(1), and Suraud Eric(2)

(1) Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, 141980, Moscow region, Russia

(2) Laboratoire de Physique Thoretique, Universit\'e Paul Sabatier, 118 Route de Narbonne, 31062 cedex, Toulouse, France

A nonlinear tunneling and transport dynamics of Bose-Einstein condensate (BEC) is discussed. The main attention is paid to Josephson oscillations, macroscopic quantum self-trapping, and controlled adiabatic transport. The discussion is focused to nonlinear effects which usually break the transport. To overcome this trouble, the novel effective and universal transport protocols are developed on the base of the Landau-Zener and Rosen-Zener schemes. They are robust in a wide range of the BEC interaction and turn the nonlinearity from the detrimental to useful factor. The perspectives of using BEC transport for generation of geometric phases and other applications are discussed.


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I-5. High Precision Electroweak Physics at LHC: Dre ll-Yan Processes

Andrey Arbuzov

Bogoliubov Laboratory of Theoretical Physics, Joint Institute for Nuclear Research, Dubna, Russia

Cross sections of single Z and W boson production processes at LHC will be measured with high precision. These processes are used for luminosity monitoring, extraction of parton density functions, calibration of detectors, and for the most precise definition of the W boson mass. Construction of an adequately accurate theoretical description of these processes is under development. QCD and electroweak radiative corrections and the present theoretical uncertainty are discussed. Recent results of the SANC project are presented.

I-6. Algebraic Lagrangian Geometry: from Geometric Quant ization to Mirror Symmetry

Nik.A. Tyurin

BLTPh JINR (Dubna)

In my talk I present a new approach to the quantization problem of classical mechanical systems with compact phase spaces. This approach generalizes quasi classical method of Maslov and Karasev where states of the quantized system are presented by weighted lagrangian cycles in the classical phase space. In contrast with the classical Maslov method we can avoid the introduction of certain correction classes (f.e. the celebrated Maslov class). At the same time our new approach exploits the procedure which was addresed to a mirror symmetry problem. So it is reasonable to expect that the geometric construction can be modified such that it will work.

I-7. Gluon condensation, Weyl reflections, CP: confineme nt, chiral symmetry and hadronization

Sergei N. Nedelko

Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna

Effective action for pure Yang-Mills gauge fields invariant under the standard space-time and local gauge $SU(3)$ transformations is considered. It is demonstrated that a set of twelve degenerated minima of the potential exists as soon as a nonzero gluon condensate is postulated. The minima are connected to each other by the parity transformations and Weyl group transformations

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associated with the color $SU(3)$ algebra. The presence of degenerate discrete minima in the effective potential leads to the solutions of the effective equations of motion in the form of the kink-like gauge field configurations interpolating between different minima. In Euclidean time-space these solutions represent domain walls. The spectrum of the charged field in the background of the kink-like gauge field is estimated for the case of infinitely thin domain wall. The domain structured gluon background offers a coherent framework for hadronization, confinement of the static and dynamical quarks, flavour $SU_\rm L(N_\rm f)\times SU_\rm R(N_\rm f)$ and $U_A(1)$ chiral symmetries dynamical breakdown and simultaneously a mechanism for resolution of the strong $CP$ problem. Within the domain model for the QCD vacuum, the structure of the effective meson Lagrangian is outlined and the spectrum of mesons is calculated .

I-8. Hybrid Exciton in Semiconductor- Organic Quantum Dot Systems

Nguyen Que Huong

Marshall University, USA

The formation of a hybridization state of Wannier Mott exciton and Frenkel exciton in different hetero-structure configurations involving quantum dots has been investigated. The hybrid excitons exist at the interfaces of the semiconductors quantum dots and the organic medium, having unique properties and a large optical non-linearity. The coupling at resonance is very strong and tunable by the parameters of the systems (dot radius, dot-dot distance, generation of the organic dendrites and the materials of the system etc). Different semiconductor quantum dot-organic material combination systems, such as a semiconductor quantum dot lattice embedded in an organic host, a semiconductor quantum dot at the center of an organic dendrite, a semiconductor quantum dot coated by an organic shell, have been considered . The formation and the properties of the organic-semiconductor hybrid excitons have been modulated by electric and magnetic fields. The hybrid excitons are as sensitive to external perturbation as Wannier-Mott excitons. We investigate the effect of mutual presence of electric and magnetic fields on the hybrid exciton of the isolated semiconductor quantum dot such as CdSe (core) clothed by an organic or glass coating for two configuration of fields when the electric and magnetic fields are parallel and orthogonal. The fields affect the eigenfunctions (by a Stark -effect distortion and by the magnetic field induced distortion) and the Frenkel-Wannier coupling term. Upon the application of the magnetic


28

and electric fields the coupling term between the two kinds of excitons increases. The most important feature of this system is by adjusting the magnetic and electric fields, one can tune the resonance between the two kinds of excitons to get different regions of mixing to obtain the expected high non-linearity.

I-9. CP Violation

D. T. Huong

Institute of Physics, No.10, Dao Tan, Thu Le, Ba Dinh, Ha Noi.

We study the CP violation in the electroweak decay. We show how the CP violation of asymmetry depends on the weak phase and strong phase of form factors. By including the scalar and vector mesons into the chiral Lagrangian, we compute the form factors of the hadronic system at the one loop correction. The direct CP violation in the semileptonic decay is considered.

O-1. Efficient GW Calculations using Eigenvalue- Eigenvector Decomposition of the Dielectric Matrix

Huy-Viet Nguyen (1,2), T. Anh Pham(2), Dario Rocca(2), and Giulia Galli(2,3)

(1) Center for Computational Physics, Institute of Physics, VAST, Vietnam

(2) Department of Chemistry, University of California, Davis, California 95616, USA

(3) Department of Physics, University of California, Davis, California 95616, USA

During the past 25 years, the GW method [1] has been successfully used to compute electronic quasi-particle excitation spectra of a variety of materials. It is however a computationally intensive technique, as it involves summations over occupied and empty electronic states, to evaluate both the Green function (G) and the dielectric matrix (DM) entering the expression of the screened Coulomb interaction (W). Recent developments have shown that eigenpotentials of DMs can be efficiently calculated without any explicit evaluation of empty states [2]. In this work, we will present a computationally efficient approach to the calculations of GW spectra by combining a representation of DMs in terms of its eigenpotentials [3] and a recently developed iterative algorithm [4]. As a demonstration of the efficiency of the method, we will present calculations of the vertical ionization potentials of several systems. [1]

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L. Hedin, Phys. Rev. 139, A796 (1965). [2] H.-V. Nguyen and S. de Gironcoli, Phys. Rev. B 79, 205114 (2009); H. F. Wilson, D. Lu, F. Gygi, and G. Galli, Phys. Rev. B 79, 245106 (2009). [3] D. Lu, F. Gygi, and G. Galli, Phys. Rev. Lett. 100, 147601 (2008). [4] P. Umari, G. Stenuit, and S. Baroni, Phys. Rev. B 81, 115104 (2010)

O-2. Monte Carlo Calculations on Magnetic Propertie s of Self -Assembled Nanochains

Tran Nguyen Lan and Tran Hoang Hai

Ho Chi Minh City Institute of Physics, VAST

In this report, we use Monte Carlo simulation to study the magnetic properties of nanoparticle-chains which are formed from individual nanoparticles with identical size under combined influence between dipolar interaction and magnetic field in the presence of particles’ uniaxial anisotropy. In the agreement with the literatures, the uniaxial anisotropy with easy axis along the chain length is found. Basing on hysteresis loops we calculate magnetic responses along the chain length and in perpendicular direction. We found that those are sensitive to synthesizing field as well as particles’ uniaxial anisotropy. We also explore the possibilities of anti-ferromagnetic intra-chains found in experiment by considering the orientation distribution of magnetic moments after the magnetic relaxation process. Contrary to distinct particle systems in literatures, the anti-ferromagnetic ordering is favored at high temperature. Finally, we investigate the influence of temperature on the magneto-resistance of self-assembled nanochains

O-3. Effect of View's Angle on the Phase Transition in t he Fishes Schooling System

P. The Nguyen(1), V. Thanh Ngo(2) and N. A. Viet(2)

(1) Departement of Natural Science, Duytan university, K7/25 Quang Trung, Haichau, Danang, Vietnam

(2) Institute of Physics, 10 Daotan, Badinh, Hanoi, Vietnam.

The Vicsek model(VM) [T. Vicsek, et. al., Phys. Rev. Lett. 75, 1226 (1995)] is a popular approaches to study the nature of the phase transition in a system of self-propelling particles. In this work, we consider a group of animal as the particles, then we assume that only the individuals in its local neighborhood within a circle sector with central angle $\phi$ (is called angle of view) andradius R are taken into account the average direction of motion. A phase diagram in the space ($\varphi$, $\eta_c$ ) has been established where $\varphi=


30

\phi/2\in[0,2\pi]$ and the critical noise $\eta_c$ is obtained at the maximum of the variance of the average normalized velocity. We shown that $\eta_c$ is strongly depends on the view's angle $\varphi\geq0,5\pi$, but itslowly varies with $\varphi<0,5\pi$

O-4. Influence of size effects on structural phase transition and domain structure of ferroelectric nano-sized BaTiO3 rods

Nguyen Thuy Trang,Nguyen Van Chinh,Bach Thanh Cong and Phan Thi Hong Ngat

Computational Materials Science Laboratory, Faculty of Physics, Hanoi University of Science, Vietnam

In this paper, ab initio calculation on the BaTiO3 quantum-rods was carried out in the framework of density functional theory (DFT) using local density approximation (LDA). While both LDA functional and gradient corrected versions underestimated the optical gap of the bulk BaTiO3, the LDA ones resulted in the better fit with experimental data. The shape ratio of the rods varied from 1:10 to 1:1 for single unit cell cross-section rods (SURs) and from 2:10 to 2:2 for double unit cell cross-section rods (DURs). Each rod ended at BaO plane or TiO2 plane. One of the most interesting observations obtained from the calculation was the structural-phase transition along the rods which has been addressed as the smeared phase transition in literatures. Besides, the mean values of c:a which were averaged over unit cells of each rod showed the stability of the tetragonal phase for BaO ended SURs (type A1) with length above 1.6 nm. For BaO ended DURs (type A2), the tetragonal phase was shown to be stable at length above 1.3 nm. These two lengths can be considered as the cubic-tetragonal transition lengths. The structural-phase transition did not occur for the TiO2 ended SURs (type B1) and DURs (type B2) at any length up to 3.2 nm. Reduction of the interaction energy between surface charges stimulates a formulation of 180o domain wall at the middle of each rod of all types. Additionally, there are an anomalous flipping of the electric dipoles at the ends of the A2 rods

O-5. Simple Model for the Distribution of Stock Mar ket Indexes

T. A. Chu, D. H. Lien, N. A. Viet

Institute of Physics, 10 Daotan, Badinh, Hanoi

It has been observed that distribution of stock market indexes areconvergent from Boltzmann distribution to Gaussian asymptotic one. We proposed a new and simple dynamic model to describle this

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convergence by time parameter, with the introduction of the relaxation time concept for a market. The result showed that our model fits well with the financial market data. Relaxation time value is little in the stable period, and big in the crisis period of the market.

O-6. Electron Distribution in AlGaN/GaN Modulation- Doped Heterostructures

Dinh Nhu Thao(1) and Nguyen Thanh Tien(2)

(1) Department of Physics, College of Education, Hue University, 34 Le Loi Street, Hue City, Vietnam

(2) College of Science, Can Tho University, 3-2 Road, Can Tho City, Vietnam

We presented a theoretical study of the distribution of two-dimensional electron gas (2DEG) along the quantization direction in an AlGaN/GaN modulation-doped heterostructure (MDHS). All confining sources, such as potential barrier, interface polarization charges, ionized donors, and 2DEG are properly taken into account within the realistic model of finitely-high barrier. We showed that the peak of electron wave function (2DEG peak) is located in a channel region near the interface plane and depends strongly on the confining sources. Irrespective of the model of finitely- or infinitely-high potential barrier, the 2DEG peak is lifted with a rise of the sheet polarization charges density and lowered with a rise of the 2DEG density. Since the key mechanisms limiting lateral transport in MDHSare alloy disorder and surface roughness scatterings that are very sensitive to the 2DEG distribution near the interface, the 2DEG mobility is found to depend strongly on the charge density of confining sources, inclusive of donors despite negligibly weak scattering from correlated donors.

O-7. Correlations of polariton condensate in Langevin eq uation approach

Doan Tri Dung (1), Cao Huy Thien(1), Tran Thoai Duy Bao(1), and Harmut Haug(2)

(1) Ho Chi Minh City Institute of Physics

(2) Institut für Theortische Physik, Goethe-Universität Frankfurt

The first-, second-order coherent function and linewidth of the polariton condensate in microcavities are calculated by using Langevin equations with including polariton-polariton off-resonant gain mechanism. The linewidth of polariton condensate is shown a


32

very good agreement with experiment at high pumping. The first-order coherent function g^1 are calculated whole temporal decay which results a coherent time determined at the time that g^1 decreases to 1/e. Taking the average of second-order coherent function in the coherent time shows a qualitative agreement with experiment and other theoretical results calculated early .

O-8. Geometric Structure, Electronic Structure, and Spin Transition of FeII Spin-crossover Molecules

Nguyen Van Thanh, Nguyen Thi Nguyet Anh, Nguyen Anh Tuan

Faculty of Physics, Hanoi University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam

The geometric structure, electronic structure and spin transition of three FeII spin-crossover molecules, i.e., [Fe(abpt)2(NCS)2] (1), [Fe(abpt)2(NCSe)2] (2), and [Fe(abpt)2(tcm)2] (3) with abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole and tcm– = [C(CN)]– = tricyanomethanide anion have been studied based on Density-functional theory. All results presented in this study were obtained by using the exchange correlation PBE functional. The effective core potential Dolg-Wedig-Stoll-Preuss were used to describe the interaction between the core and valance electrons. For better accuracy, the hexadecapolar expansion scheme is adopted for resolving the charge density and Coulombic potential. Both geometric structures corresponding to the high-spin and low-spin states of these molecules obtained from our calculations are in good agreement with available experimental data. Our calculated energy difference between the low and high spin states is 0.14, 0.18, and 0.20 eV for (1), (2), and (3), respectively. Also, we succeed in determining the spin transition state of these molecules by using the Linear-Synchronous-Transit method.

O-9. Electron scattering rates by optical phonons in a c ircular semiconductor quantum wire with a metal cover.

Nguyen Nhu Dat(1) and Le Thanh Hai(2).

(1) Institute of Physics, VietNam Academy of Science and Technology, 10 DaoTan, BaDinh, Hanoi

(2) Hanoi University of Civil Engineering

A macroscopic continuum model is used to study the longitudinal optical phonons in a circular semiconductor quantum wire which is embedded in a metal cover.The Hamiltonian describing the electron-LO phonon interaction is obtained and used to calculate the rates of

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electron scattering by optical phonons.

O-10. The Damp ing Correction Derived from Electrons Scattering wi th Magnetization

Chia-Chu Chen and Chien Chih Chiu

National Cheng-Kung University Physics Department Tainan,Taiwan ROC

The LLG is equatuion is a well known approach for the damping mechanism of magnetization, In this work, by using Many Body Formalism we calculate the correction to the LLG equation due to the scattering of electrons with magnetization. The correction was obtained by evaluating the back reaction of the spin torque. The corrections are obtained for both time dependent and time independent mgantization distribution. Our results are different from the results reported previously by using the spin projection method together with applying the Omh's law where such approach is in fact unjustisfied.

O-11. Local-field correction in the strong-coupling regim e

Tran Minh Hien(1), Ho Trung Dung(1), and Dirk- Gunnar Welsch(2)

(1) Institute of Physics, Academy of Sciences and Technology, 1 Mac Dinh Chi Street, District 1, Ho Chi Minh City, Vietnam

(2) Theoretisch-Physikalisches Institut, Friedrich-Schiller-Universit¨at Jena, Max-Wien-Platz 1, D-7743 Jena, Germany

The influence of the local-field correction on the strong atom-field coupling regime are investigated using the real-cavity model. The atom is positioned at the center of a multilayer sphere. Three types of mirrors are considered: perfectly reflecting, Lorentz band gap, and Bragg-distributed ones, with special emphasis on experimental practicability. In particular, the influence of the local field on the spectral resonance lines, the Rabi oscillation frequency and decay rate, and the condition indicating the occurrence of the strong-coupling regime are studied in detail. It is shown that the local-field correction gives rise to a structureless plateau in the density of states of the electromagnetic field. The level of the plateau rises with increasing material density and/or absorption, which may eventually destroy the strong-coupling regime. The effect of the local field is especially pronounced at high-material densities due to direct energy transfer from the guest atom to the medium. At lower material density and/or absorption, variation of the material density does not seem to


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affect much the strong-coupling regime, except for a small shift in the resonance frequency.

O-12. Gauge Interaction with space- time Dependent Coupling Parameter

Dao Vong Duc

Institute of Physics - 10 Dao Tan, Ba Dinh, Ha Noi

We consider a version of gauge invariance theory with gauge coupling parameter dependent on space-time coordinates. The model could allow the gauge bosons to acquire mass independently of Higgs mechanism. For illustration an example has been given for the case of fiber bundle 5-dimensional space-time, where the compactification length for spacial extradimension depends on 4-space-time coordinates

O-13. On a Phase Transition of Bose Gas

Tran Huu Phat(1), Le Viet Hoa(2), Nguyen Tuan Anh (3), Nguyen Van Long(4), Nguyen Chinh Cuong(5)

(1) Vietnam Atomic Energy Commission, Hanoi, Vietnam

(2) Hanoi University of Education, Hanoi, Vietnam

(3) Electronics Power University, Hanoi, Vietnam

(4) Gialai Teacher College,Pleiku, Vietnam

(5) Hanoi University of Education, Hanoi, Vietnam.

The Cornwall-Jackiw-Tomboulis (CJT) effective action at finite temperature is applied to study the phase transition in Bose gas. The effective potential, which preserves the Goldstone theorem, is found in the Hartree-Fock (HF) approximation. This quantity is then used to consider the equation of state (EOS) and phase transition of the system.

O-14. The free Parameter in Regulation of Convergence Rat e of the FK Operator Method for Exact Numerical Solutions of the Schrodinger Equation

Hoang Do Ngoc Tram, Le Van Hoang

Department of Physics, Ho Chi Minh City University of Pedagogy

A universal criterion is proposed to define the free parameter when applying the FK operator method for solving the Schrödinger equation. We also show that the convergence rate of approximation

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series can be regulated by this method of choosing the free parameter. Applying for an anharmonic oscillator as a sample problem, the exact numerical solutions (wavefunctions and energies) for which are obtained by very fast algorithm based on the FK operator method and the proposed criterion.

O-15. Microscopic Description of Nuclear Thermodynamic Pr operties

Nguyen Quang Hung(1,2)

(1) Tan Tao University, Tan Tao University Avenue, Tan Duc Ecity, Duc Hoa, Long An

(2) Institute of Physics, VAST, No 10 Dao Tan, Ba Dinh, Hanoi

Study of thermodynamic properties of highly excited (hot) nuclei has been a topic of much interest in nuclear physics. In this talk, two theoretical microscopic approaches, which have recently developed in Refs. [1, 2], will be presented. These approaches are derived based on the solutions of the Bardeen-Cooper-Schrieffer (BCS) theory and the self-consistent quasiparticle random-phase approximation (SCQRPA) [3] in combination with the Lipkin-Nogami particle-number projection at zero temperature embedded into two principal ensembles, namely the canonical ensemble (CE) and microcanonical ensemble (MCE). The results obtained agree well with the recent data extracted from experimental level densities by Oslo ( Norway) group for 56Fe, 94, 98Mo, 162Dy and 172Yb nuclei

O-16. Dark matter in the economical 3-3-1 model

Nguyen Thi Thuy(1,2), Do Thi Huong(2), Hoang Ngoc L ong(2)

(1) Department of Physics, Yonsei University, Seoul, Korea

(2) Institute of Physics, VAST, Hanoi, Vietnam

In the economical 3-3-1 model, the spontaneous symmetry breaking is achieved by two Higgs scalar triplets only. The model contains two natural massive physical fields. One is identified to the SM Higgs –H0

and the other is a new Higgs- H01 In the effective limit, ω >> u, v, H0

1

is stable and naturally considered as candidate for dark matter without any discrete symmetry conservation. Using MicrOMEGAs 2.4for calculating the Dark matter relic abundance, we find out the constraints of the self Higgs coupling constants, exotic quark masses and the value of the VEV. ω. In addition, we study implication for direct and indirect search of dark matter.

O-17. Neutrality Effects on the Phase Structure of the Li near Sigma


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Model with the Non-Standard Symmetry Breaking Term

Tran Huu Phat(1), Nguyen Van Long(2), Nguyen Van Th u(3,4)

(1) Vietnam Atomic Energy Commission, 59 Ly Thuong Kiet, Hanoi, Vietnam

(2) Gialai Junior College of Education, 126 Le Thanh Ton, Pleiku, Gialai, Vietnam

(3) Department of Physics, Hanoi University of Education II

(4) Institute of Nuclear Science and Tech

The neutrality effects on the phase structure of the linear sigma model with the non-standard symmetry breaking term is systematically studied by means of the Cornwall-Jackiw-Tomboulis effective potential. The latter quantity is calculated in the improved Hartree-Fock approximation which preserves the Goldstone theorem and the thermodynamic consistency. Its results that in the region $\mu > m_\pi$, the pion mass in vacuum, as a function of the temperature $T$, the pion condensate undergoes a second order phase transition, as a function of the isospin chemical $\mu$, it undergoes a first order phase transition. In the region $\mu < m_\pi$, the pion condensation is always a first order phase transition. Bằng phương pháp thế hiệu dụng Cornwall-Jackiw-Tomboulis, chúng tôi tiến hành nghiên cứu sự ảnh hưởng của ñiều kiện trung hòa ñiện tích ñến cấu trúc pha trong mô hình sigma tuyến tính. Các tính toán ñược thực hiện trong gần ñúng Hartree-Fock cải tiến (giữ ñược ñịnh lý Goldstone và phù hợp với nhiệt ñộng lực học). Kết quả cho thấy ởtrường hợp thế hóa spin ñồng vị nhỏ hơn khối lượng pion, ngưng tụpion thuộc chuyển pha nhiệt loại II và chuyển pha lượng tử loại I, còn trong trường hợp thế hóa lớn hơn khối lượng pion thì ngưng tụ pion luôn là chuyển pha loại I.

O-18. A new method to determine experimentally the impuri ty concentration in n-i-p-i superlattices

Tran Cong Phong(1), Luong Van Tung(2), Vo Thanh Lam (3)

(1) Department of Physics, Hue University's College of Education, 32 Le Loi, Hue

(2) Department of Physics, Dong Thap University, 783 Pham Huu Lau, Cao Lanh, Dong Thap, Viet Nam

(3) Department of Natural Sciences, Sai Gon University 273 An Duong Vuong, Di

The electro-phonon resonance (EPR) effect in doped semiconductor

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superlattices (DSSL) are investigated by using the quantum kinetic equation (QKE) for electrons interacting with LO phonon. We obtain the general analytic expression for optical absorption power. We also obtain an EPR condition as a function of the photon energy and doped concentration of donor and acceptor impurities. We discuss anomalous behaviors of the EPR effect such as the splitting of EPR peaks for the photon energy or the doped concentration. We have found that the distance of peaks directly proportional to the doped concentration. From this result we propose a new method to determine experimentally the impurity concentration in n-i-p-i superlattices by utilizing EPR effects.

O-19. Quantum Theory of the Acoustoelectric Effect in a Q uantum Well

Nguyen Quang Bau(1), Nguyen Van Hieu(2)

(1) Department of Physics, College of Science, VNU

(2) Department of Physics-Danang University of Education

The acoustoelectric effect (AE) in a quantum well (QW) is investigated for an acoustic wave whose wavelength λ=2 π/q is smaller than the mean free path l of the electrons and hypersound in the region ql>>1 (where q is the acoustic wave number). The dependence of the acoustoelectric current jac on the acoustic intensity φ, the acoustic wave number q, the width of the QW L and the temperature T of the system is obtained by using the quantum kinetic equation. The analytical expression for the acoustoelectric current jac is calculated for constant of momentum relaxation time. The result indicates that the existence of jac in QW is attributed to the finite gap band. Numerical calculations is done, and the result is discussed for a typical AlAs/GaAs/AlAs QW. In the case the dependence of jac on the temperature T of system. Our result was found to show a non-monotonic temperature dependence with a maximum at 50K and 48K for q=10^7 (1/m) and q=1.2×10^7(1/m), respectively, which agrees with the experimental results. In addition, it appears another peak at T>300K, and this result is also compared with the normal bulk semiconductor and superlattice to show the difference, and the quantum theory of acoustoelectric effect in quantum well is newly developed.

O-20. Some results of the nanowires growth on GaAs semico nductor substrate by VLS method: the growth mechanisms and abnormal phenomena


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Phan Anh Tuan, Nguyen Tien Dai, Dao Duc Khang and Dao Khac An

Institute of Materials Science (IMS) - Vietnam Academy of Science and Technology (VAST)

18 Hoang Quoc Viet road, Cau Giay, Hanoi Vietnam

Nanowires grown on GaAs semiconductor substrate have many interesting properties such as direct bandgap, controllable band gaps, quantum confined laterally…they play very important roles in nanoelectronics. The nanowires are often grown by different methods such as Vapor Liquid Solid (VLS), Chemical Vapor Deposition (CVD), Laser Ablation Catalytic Growth (LCG), Fluid Liquid Solid (FLS), Solution Liquid Solid (SLS), Oxide Assisted Growth (OAG), and Molecular Beam Epitaxy (MBE)… Among synthesis methods, the VLS method is a simple, popular, cheap method. So far although many scientific efforts achieved over more 40 years, but many aspects of VLS method are still not yet clearly understood, for example, the influences of technological conditions, sized effects, the diffusion effect of Au catalyst atoms, nanowires seed formation… This paper reports some our experimental results of synthesis of GaAs semiconductor nanowires, and also about an abnormal phenomena of the reverse -VLS concerning the nanowires growth, then we will discuss about the aspects of the growth mechanisms, structural properties and the effect of Au catalyst metal on the nanowire growth process

O-21. S_4 Symmetry and Radiatively Generated Leptogenesis

Nguyen Thanh Phong

CanTho University

We study S_4 flavor symmetries realized at the GUT scale in the context of a seesaw model. It has been shown that at the leading order, the models give the exact tri-bimaximal pattern of the lepton mixing matrix and predict vanishing lepton asymmetries. We find that, in the minimal supersymmetric extension of the seesaw model with suitable choice of supersymetry parameter , the renormalization group (RG) evolution from the GUT scale to seesaw scale, without considering any higher order terms or any symmetry breaking terms by hand, we obtained tiny deviations of lepton mixing angles from their tri-bimaximal values. In addition, by a reasonable choice of model parameters compatible with low-energy data, such RG effects lead to non-zero lepton asymmetries from the decays of right-handed neutrinos, as a result, the baryon asymmetry of the Universe is

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successful generated through leptogenesis.

P-1. Generally Covariant Duality and Gravitational Scalar Fields

Dao Vong Duc(1), Phan Hong Lien(2), Nguyen Quynh La n(3)

(1) Institute of Physics - 10 Dao Tan, Ba Dinh, Ha Noi

(2) Military Technical Academy - 10 Hoang Sam, Hoang Quoc Viet, Cau Giay, Ha Noi

(3) Hanoi University of Pedagogy - 136 Xuan Thuy, Cau Giay, Ha Noi

The concept of Duality is considered in the framework of tetrad formalism for General Relativity. The equations for scalar fields attached to generalized Levi-Civita tensor are derived on the base of tetrad postulate. It is shown that their masses are closely related to Einstein's Cosmological constant, and the existence of scalar particle with negative squared mass ( tachyon ) is also predicted.

P-2. Dynamical behaviors of a field system admitting vor tex solutions

Nguyen Vien Tho and To Ba Ha

Hanoi University of Technology

We study the phase space around the static vortex solutions in the system of a complex scalar doublet with an approximate $U(2)$ symmetry, by applying a numerical approach. The time evolution of the field profiles and the total field energy density is obtained. It is shown that there exist order-chaos phase transitions in the system, and, dispite of phase transitions and deformations of field profiles by fluctuations, the vortex shape of the total energy is stable.

P-3. Some Interesting Properties of While Hole in the Ve ctor Model for Gravitational Field

Vo Van On

Department of Physics – Natural Sciences faculty - Thu Dau Mot University

There is a strange macro object existing in the vector model of gravitational field, called while hole, it appears after the black hole disappear and has many strange properties. In this paper we show some its interesting properties and point out a object similar to it in universe.

P-4. The Electroweak Theory at finite Temperature a nd Density


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Phan Hong Lien(1), Do Thi Hong Hai(2)

(1) Military Technical Academy

(2) Ha noi university of Mining and Geology

Spontaneous symmetry breaking in the electroweak theory is investigated at finite temperature and non-zero chemical potential. We consider two sceneries $\mu^2>m^2>0$ and $m^2

P-5. On the q-Deformed Multimode Oscillators

Luu Thi Kim Thanh and Tran Thai Hoa

Hanoi Pedagogical University No.2

We consider the extension of q- deformed multimode oscillators in both q-deformed multimode boson oscillators of different mode not quite independently and q-deformed multimode boson oscillators in which each oscillation mode has its own deformation parameter. The realization of SUq(2) in terms of q – deformed bosons is constracted and some applications to physics problems are derived.

P-6. S_3 flavor Symmetry Extension of the Standard Model

P. V. Dong(1), H. N. Long(1), V. V. Vien(2)

(1) Institute of Physics, Vietnam Academy of Science and Technology

(2) Department of Physics, Tay Nguyen University

We first give a summary of S_3 non-Abelian discrete symmetry and its implication for flavor physics. We then introduce this group into the 3-3-1 model. We argue how flavor mixing patterns and mass splittings are obtained with a perturbed S_3 symmetry.

P-7. The quantum statistics of R(q)-deformed crysta l lattice vibration

Nguyen Thi Ha Loan, Le Khac Quynh

Ha Noi Pedagogical University N02

The study of q-deformed algebra has been stimulated during the recent years since their new mathematical structures are relevant for a variety of diverse problems in theoretical physics. The deformed oscillator formalism, which is a generalization of the schwinger approach to the quantum theory of angular momentum, plays a using role in the study of the quantum optics, condensed matter physics. In this work we construct a R(q)-deformed crystal lattice vibration and

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introduce an energy spectrum, which is depending on deformed parameters and consider a statistical distribution of this vibration.

P-8. The nuclear Scatter ing of Polarized Neutrons on Surface of Crystal with Polarized Nucleus

Vu Thi Thu Trang, Nguyen Dinh Dung

Department of Physics, college of Science, VNU

In the article; the nuclear scattering of polarized neutrons on surface of crystal with polarized nucleus is studied. In order to study this problem the method of nuclear optics of polarized matter have been used. We obtained the effective cross-section of nuclear scattering of polarized neutrons by crystal surface in case of total reflection. We showed that, this cross- section of scattering have important information about correlative functions of surface nuclear spins

P-9. Quasi-Bound States of Dirac Fermions in Gate-T unable Disk -Like Graphene Quantum Dots

Bui Thi Hanh and Nguyen Thi Thuong

Centre for Computational Physics, Institute of Physics, VAST 10 Dao tan, Ba Dinh Distr., Hanoi, Vietnam

We suggest a simple model of disk-like graphene quantum dots controlled by the two gates, the back gate and the top one. The gate voltages are non-linearly screened by the charge carriers. By solving Dirac-like equations in two cases, without and with a perpendicular magnetic field, the electronic structure of quantum dots is systematically studied for varying gate voltages and magnetic fields.

P-10. Magnetophonon and Cyclotron Resonances Line- widths in Cylindrical Quantum Wires

Tran Cong Phong(1), Le Dinh(1), and Huynh Vinh Phuc (2)

(1) Department of Physics, Hue University’s College of Education, 32 Le Loi, Hue

(2) Department of Physics, Dong Thap University, 783 Pham Huu Lau, Cao Lanh, Dong Thap

Magnetophonon resonance (MPR) and cyclotron resonance (CR) are investigated in cylindrical quantum wires (CQWR) in the presence of a laser field. We obtain the analytical expressions and graphs of absorption power. From graphs of the absorption power we obtain line-widths as profile of the curves in both cases MPR and CR. The


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dependence of both resonance line-widths on different factors are considered and the results are compared together to show the differences. The conditions for MPR, CR and optically detected magnetophonon resonance (ODMPR) are also discussed.

P-11. Quantum kinetics of the polariton conden sate in semiconductor microcavities

Cao Huy Thien(1), Tran Thoai Duy Bao(1) and Harmut Haug(2)

(1) Ho Chi Minh City Institute of Physics

(2) Institut für Theortische Physik, Goethe-Universität Frankfurt

The formalism of non-equilibrium Green functions is used to derive quantum kinetics equations for polariton condensate in semiconductor microcavities. The interacting polaritons are treated in the low-density approximation due to Popov, in which the anomalous excitations are neglected. These equations are solved in stationary situation by inserting the spectral functions in their quasi-equilibrium forms into the scattering integrals.

P-12. The Parametric Transformation Coefficient Of Confin ed Acoustic Phonons And Confined Optical Phonons In Th e Cylindrical Quantum Wire With Infinite Potential

Le Thai Hung(1), Kim Thi Phuong(1), Luong Van Tung (2), Nguyen Quang Bau(1)

(1) Department of Physics, College of Natural Sciences, Hanoi National University No. 334, Nguyen Trai Str., Thanh Xuan Dist., Hanoi, Vietnam

(2) Department of Physics, Dong Thap University, Cao Lanh city

The parametric transformation coefficient of confined acoustic phonons and confined optical phonons in the cylindrical quantum wire with infinite potential is theoretically studied by using a set of quantum kinetic equations for the confined phonons. Numerical computations of theoretical results and graph are performed for GaAs/GaAsAl cylindrical quantum wire. Survey results show that parametric transformation coefficient depends on temperature T, the wire radius R, wave number q, frequency Ω , electric field intensity Eo, parameter characteristic of quantum wire and the confined index “m, k”,. These results are used to compare with those for case unconfined phonons. The value of parametric transformation coefficient in the case of confined phonons is larger than in the case of unconfined.

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P-13. The Acoustomagnetoelectric Current of a Rectangular Quantum Wire with an Infinite Potential in the Presence of an External Magnetic Field

Nguyen Van Nghia(1), Dinh Quoc Vuong (2), Nguyen Quang Bau(3)

(1) Department of physics, Water Resources University, Hanoi, Vietnam

(2) Quangninh Department of Education and Training, Quangninh, Vietnam

(3) Department of Physics, College of Natural Sciences, Hanoi National University, Hanoi, Vietnam

The acoustomagnetoelectric effect in a rectangular quantum wire with an infinite potential in the presence of an external magnetic field is investigated by using Boltzmann kinetic equation for an acoustic wave whose wavelength λ = 2π/q is smaller than the mean free path l of the electrons and hypersound in the region ql >> 1, (where q is the acoustic wave number). The analytic expression for the acoustomagnetoelectric current I is calculated in the case: relaxation time of momentum τ is constant approximation and non-degenerate electron gas. The dependence of the expression for the acoustomagnetoelectric current I on the acoustic wave numbers q and on the parameters of the rectangular quantum wires is obtained. Numerical calculations have been done and result is analysed for GaAs rectangular quantum wire with an infinite potential. This result is also compared with the result of the experiment in the normal bulk semiconductors, the superlattices and the cylindrical quantum wire to show the different.

P-14. The Influences of Confined Phonons on the Nonlinear Absorption Coefficient of a Strong Electromagnetic wave by Confined Electrons in Compositional Superlattices

Do Manh Hung

Department of Physics, College of Natural Sciences, Hanoi National University, No. 334, Nguyen Trai Str., Thanh Xuan Dist., Hanoi, Vietnam

Analytic expressions for the nonlinear absorption coefficient (nonlinear absorption coefficient = NAC) of a strong electromagnetic wave (laser radiation) caused by confined electrons for the case of electron - optical phonon scattering in compositional superlattices (compositional superlattices = CSL) are calculated by using the


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quantum kinetic equation for electrons. The problem is also considered for both the absence and the presence of an external magnetic field. The dependence of the NAC on the intensity E0 and the frequency of the external strong electromagnetic wave (electromagnetic wave = EMW), the temperature T of the system, and the cyclotron frequency for case of an external magnetic field is obtained. The analytic expressions are numerically evaluated, plotted, and discussed for a specific CSL GaAs-Al0.3Ga0.7As. The computations show that the NAC in CSL is much more greater than to it is normal bulk semiconductor. The appearance of an external magnetic field causes surprising changes in the nonlinear absorption. All the results are compared with those for the normal bulk semiconductors to show the difference.

P-15. Cyclotron Resonance Line-width Due to Electron-LO- phonon Interacting in Rectangular Quantum Wire

Huynh Vinh Phuc(1), Le Dinh(2), and Tran Cong Phong (2)

(1) Department of Physics, Dong Thap University, 783 Pham Huu Lau, Cao Lanh, Dong Thap

(2) Department of Physics, Hue University’s College of Education, 32 Le Loi, Hue

In this paper, the dependence of cyclotron resonance line-width (CRLW) on temperature, magnetic field and the size of the system are examined theoretically by computational method when a magnetic field applied in the transverse direction to the rectangular quantum wire. It is shown that CRLW depends strongly on the magnetic field in the strong magnetic field whereas the behavior of CRLW is determined primarily by the size of quantum wires in the weak magnetic field. In both cases of strong and weak magnetic field, CRLW increases with temperature and decreases with the size of the quantum wire.

P-16. Influence of form Factor on Absorption Line-Widths in Quantum wells with Semi-Inverse-law Potential

Le Dinh(1), Tran Cong Phong(2)

(1) Hue University's College of Education

(2) Vietnam Educational Labor Union, Hanoi

Based on projection operator methods we obtain the analytical expression for the absorption power of an electromagnetic wave due to electron-acoustic phonon and electron-optical phonon scattering in

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quantum wells with semi-inverse-law potential. Based on the obtained analytical expression we plotted graphs describing thedependence of the absorption power on the frequency of the laser field. From these graphs we obtained linewidths as profile of curves. The obtained results were considered in different kinds of electronic transitions between different levels which shows the impact of the form factor on the studying effects.

P-17. Optically Detected Electron Energy Spectrum in Rect angular Quantum Wires

Le Thi Thu Phuong, Tran Cong Phong

Hue University's College of Education

The electrophonon resonances (EPR) and optical detected electron energy spectrum (ODEES) in rectangular quantum wires (RQWs) are investigated by using the quantum kinetic equation (QKE) for electrons to obtain the general analytic expression for optical absorption coefficient. We also obtain ODEES conditions as functions of the photon energy. In particular, due to the appearance of peaks in absorption spectrum satisfying the condition of electron-phonon resonance we obtain a relation between photon energy,distance of the two peaks, and electron subbands in the RQWs. The importance of the result is that the splitting of peaks for incident photon energy can be used to detect electron energy spectrum in the special RQW. The obtained ODEES show that they do not depend on the temperature.

P-18. The Coulomb Interaction for Electrons and Holes in Bilayer Parabolic Quantum Dots

Nguyen Duong Bo and Nguyen Hong Quang

Institute of Physics, VAST, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam

We consider electron-hole systems in a bilayer quantum dot where the electrons and the holes are located on two spatially separated 2D parabolic quantum dots. The most important quantity needed in studies of many electron-hole systems is the Coulomb interaction between electrons and holes in finite systems. In recent paper by Ian M-Sh et al [Computer Physics Communications 181, 1510 (2010)] the Coulomb matrix elements are presented in term of infinite series and numerically calculated by a procedure using u-type Levin transform. In this paper, for the first time in a bilayer parabolic quantum dot we derive an analytical expression of the matrix elements for the electron-hole Coulomb interaction in term of finite


46

series. Our results are then compared with the above mentioned work to see their advantages in numerical calculation, especially for not very high levels. Based on our obtained results for electron-hole Coulomb interactions, some calculation of optical properties for exciton and charged excitons in bilayer parabolic quantum dots are demonstrated.

P-19. Effects of disorder and magnetic field on transport properties of Graphene nanoribbons

Tran Nguyen Dung and Nguyen Manh Trinh

Centre for Computational Physics, Institute of Physics, VAST 10 Dao Tan, Ba Dinh Distr., Hanoi, Vietnam

We study the transport properties of graphene nanoribbons with disorders within the framework of the well-known Anderson model. Using the recursive Green’s function method, the conductance has been systematically calculated for ribbons of various widths, with different disorder magnitudes, and in a large range of perpendicular magnetic field. Obtained results are critically analyzed to show the effects of each factor

P-20. Transport Through Graphene p-n Junctions

Nguyen Thi Thuong and Nguyen Manh Trinh

Centre for Computational Physics, Institute of Physics, VAST 10 Dao Tan, Ba Dinh Distr., Hanoi, Vietnam

We study transport properties of the gate-tunable graphene p-n junctions, taking into account (i) the non-linear screening of gate potentials and (ii) the non-zero carrier density at the neutral point. Using the T-matrix method the resistance and the shot noise have been calculated for junctions under different gate voltages. The resistance obtained as a function of gate voltages describes very well experimental data. The calculated noise shows the Fano factor of $\sim$ 0.29 at the Dirac point which is in excellent agreement with the result of the semiclassical theory.

P-21. Density Functional Tight Binding Study on ZnS Nano Wire

Le Thi Hong Lien, Vu Ngoc Tuoc, Nguyen Thi Thuong

Institute of Engineering Physics (IEP), Hanoi University of Science and Technology (HUST),

We present a semi-abinitio - Density Functional Based Tight Binding (DFTB) study on the atomic and electronic structure of ZnS Nanowire

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and examine the dependence of surface stress on nanowire lateral size and shape. The ZnS wurtzite wire’s size ranges from 10 to 45 and of various possible shapes - triangular, hexagonal and circular-like. We investigate the role of unsaturated dangling bond state in the region of bandgap while varying the wire’s diameter. We have calculated the surface formation energy and find that it decrease with increasing the wire diameter and a greater stability (lower surface formation energy) comes with hexagonal and circular-like depending on wire’s diameter. Other electronics and mechanical properties e.g. Density of States (DOS), young modulus … are found to depend on the wire’s size and shape. Futher the wire passivation by hydrogen has also investigated. Keyword: ZnS Nanowires, Density functional theory, Molecular Dynamics.

P-22. Mô hình liên k ết lò xo ñàn hồi và ph ổ tán s ắc của phonon trong Graphene

Nguy ễn Văn Duy, Đỗ Vân Nam

Viện khoa học công nghệ tiên tiến, Đại học Bách Khoa Hà Nội

Bài báo trình bày các kết quả tính toán về phổ tán sắc và mật ñộtrạng thái của phonons bên trong vật liệu graphene, một dạng thù hình hai chiều tinh tế của cácbon, sử dụng mô hình liên kết lò xo ñàn hồi giữa các nguyên tử cácbon. Các tham số của mô hình ñược xác ñịnh bằng cách khớp phổ tán sắc của phonons với các số liệu thực nghiệm. Tính toán cho thấy mô hình liên kết lò xo ñàn hồi mặc dù ñơn giản nhưng lại cho kết quả khá tốt so với các phương pháp tính khác.

P-23. On the Thermodynamic Equivalency between Noniteract ing Bose and Fermi gas in Graphene Ribbons

P.T.K. Hang, T.A. Chu, N.L. Hoai, T.T.T. Van, N.A. Viet

Institute of Physics, 10 Daotan, Badinh, Hanoi

In this work, the ‘unusually” equivalent between Bose and Fermi ideal gases for metallic and semiconductor graphene ribbons isinvestigated. We show that, in the case of metallic graphene ribbons, due to their linear dispersion law, this equivalency is quite good for narrow ribbons and becomes worse for the more wide ribbons. In inverse, for the case of semiconductor ribbons, because their dispersion law is closely parabolic, this equivalency is more applicable for the wide ribbons and is failed for very narrow ribbons.

P-24. Influence of Laser Radiation on the Hall Effect in Quantum Wells


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with Parabolic Potential

Bui Dinh Hoi(1), Nguyen Thu Huong(2), Nguyen Quang Bau(3)

(1) Department of Physics, National University of Civil Engineering, 55 Giai Phong, Hai Ba Trung, Hanoi

(2) Faculty of Basic Sciences, Academy of Air Defense and Air Force, Hanoi

(3) Department of Physics, College of Natural Sciences, Hanoi National Unive

Based on the quantum kinetic equation for electrons, we theoretically study the influence of laser radiation on the Hall effect in a quantum well

(QW) with parabolic potential ( ) 2 2 2= ωzV z m z / (where m and zω are

effective mass of electron and confinement frequency of QW,

respectively) subjected to a crossed dc electric field ( )1 10 0=rE , ,E and

magnetic field ( )0 0B ,B,=r

in the presence of a strong electromagnetic

wave (EMW) (laser radiation) characterized by electric field

( )( )0 0 0= ΩrE E sin t , , (where 0E and Ω are amplitude and

frequency of EMW, respectively). We obtain the analytic expressions for the components zzσ and xzσ of Hall conductivity as well as Hall

coefficient HR with the dependence on B, 1E , 0E , Ω , temperature T of

system and characteristic parameters of QW. The results are numerically evaluated and graphed for a specific quantum well GaAs/AlGaAs to show clearly the dependence of Hall conductivity and Hall coefficient on above parameters. The influence of EMW is interpreted by the dependence of Hall conductivity and Hall coefficient on amplitude 0E and frequency Ωof EMW besides the dependence on magnetic B and dc electric field 1E

as in ordinary Hall effect. Especially, when 0E is zero we get the results as

in the case of absence of EMW. Moreover, in the limit of confinement frequency ωz tends to zero the results are in agreement with those in

bulk semiconductor.

P-25. Calculations of high order EXAFS cumulants of FCC c rystals

Ho Khac Hieu(1), Nguyen Van Hung(2), Vu Van Hung (3), Lang Duc Sy(1), Vu Van Khai(1,2) and Tong Sy Tien(2)

(1) National University of Civil Engineering, 55 Giai Phong, Hanoi,

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Vietnam

(2) Hanoi University of Science, VNU, 334 Nguyen Trai, Hanoi, Vietnam

(3) Hanoi National University of Education,136 Xuan Thuy, Hanoi, Vietnam

The cumulant expansion is one of the simple and effective methods on analyzing the EXAFS data. In this paper, the second order perturbation theory and anharmonic correlated Einstein model have been applied to investigate the Extended x-ray absorption fine structure (EXAFS) cumulants of crystals using the Morse interatomic potential. The analytical expressions of high order EXAFS cumulants of FCC crystals ($\sigma^(^3^)$ and $\sigma^(^4^)$) have been derived. Numerical calculations have been done for Cu and Ni metals. Our results are in reasonable quantitative agreement with experimental data as well as other theoretical calculations available.

P-26. Application of q-Deformed Fermi- Dirac Statisti cs to the Specific Heat Capacity of Free Elecirons of Metals

Vu Van Hung(1), Luu Thi Kim Thanh(2), Duong Dai Phu ong(3)

(1) Hanoi National University of Education, 136 Xuan Thuy Street, Hanoi

(2) Hanoi pedagogic University No-2, Xuan Hoa, Phuc Yen, Vinh Phuc

(3) Tank Armour Officers Training School, Tam Duong, Vinh Phuc.

In this article, contribution of the free electrons to the specific heat capacity of metals in low temperature is investigated by using the q-deformed fermi-dirac statistics. We obtained the analytic expressions of the specific heat capacity of metals and the value of q-deformed parameter. Present theoretical calculations of specific heat capaciy for some kinds of alkali and transition metals have been performed and compare with the experimental results.

P-27. Ordered Theory Of β- CuZn Alloy

Pham Dinh Tam(1), Pham Duy Tan(2), Nguyen Quang Hoc (3), Dang Thi Phuong Hai(4) and Nguyen Thi Binh(4)

(1) Le Quy Don University of Technology, 100 Hoang Quoc Viet Street, Cau Giay District, Hanoi; (2) College of Armor, Tam Dao, Vinh Phuc; (3) Hanoi National University of Education, 136 Xuan Thuy Street, Cau Giay District, Hanoi; (4) Hanoi University of Ed


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By applying the model of pair interaction, the model of central atom, the method of coordination sphere and the statistical moment method, we calculate the free energy of β- CuZn ordered alloy and determine the dependence of ordered parameter and lattice constant on pressure and temperature for this alloy. The obtained results have simple analytic, easy to calculate form and our numerical results are in good agreement with the experimental data.

P-28. Study On Disordered Binary Alloy

Pham Dinh Tam (1), Pham Duy Tan (2), Nguyen Quang H oc (3), Le Hong Viet (4) and Nguyen Hong Son (5)

(1) Le Quy Don University of Technology, 100 Hoang Quoc Viet Street, Cau Giay District, Hanoi

(2) College of Armor, Tam Dao, Vinh Phuc

(3) Hanoi National University of Education, 136 Xuan Thuy Street, Cau Giay District, Hanoi

(4) Hanoi University of Educa

Using the model of central atom and the method of coordination sphere in statistical physics, we analyse a disordered binary alloy into a combination of two more simple systems (called effective metals) and determine the relation of free energy between these systems. From that we derive the analytic expression of free energy for disordered binary alloy. Numerical calculations for thermodynamic quantities of CuAl disordered alloy with 3% and 8% Al atoms are in good agreement with the experimental data.

P-29. Khảo sát m ột số tính ch ất phi c ổ ñiển của các tr ạng thái phi c ổñiển

Võ Tình, Đặng Hữu Định

Trường Đại học Sư phạm Huế

Trong bài báo này, chúng tôi sẽ khảo sát một số tính chất phi cổ ñiển như tính sub-poisson, tính antibunching của các trạng thái nén, trạng thái kết hợp ñiện tích phi tuyến chẵn lẻ…Vấn ñề nén bậc cao trong các trạng thái kết hợp ñiện tích phi tuyến chẵn lẻ theo kiểu Hillery và kiểu Hong-Mandel ñược quan tâm khảo sát.

P-30. Numerical modeling of the intra- cavity stimulated Raman Scattering as a source of sub- nanosecond optical p ulses

Chu Van Bien

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Hong Duc University

We present a computer numerical mode (virtual sub- nanosecond laser) utilizing intra-cavity stimulated Raman scattering. The goal of this work is to shorten laser output pulses (for which the highly nonlinear fredquency conversion process – stimulated Raman scattering – is used) and to obtain high efficency (which is enhanced by placing a Raman- active crystal inside the cavity where the fundamental laser frequency intensity is maximal). The following laser components were modeled: a diode- pumped soild- state laser active medium (a crystal of the Nd3+: YLF type), a closed cavity for a wave on its fundamental frequency with a Q- switching element and an internal sub- frequency. The model components are: a numerical integrator of a set of three rate equations (for an inverse population of the laser medium and for the number of fundamental and Stokes frequency phontons), random number sources for radiation seeding, and an interactive data input interface and graphic output. A wide range of parameters was investigated and output pulses as short as 0.8 ns were found. The optimal conditions for the maximal peak power of Stokes pulses were determined and the conditions for generating pulse trains for burst laser machining were identified.

P-31. Possibility of Tracking Imino- Amino Tautomerism of Cytosine by Ultra-Short Laser Pulses using High- Order Harmonic Generation

Nguyen Thi Hien(1), Hoang Van Hung(2), Le Van Hoang (2)

(1) Department of Science and Technology, Tay Nguyen University, 567 Le Duan, Buon Ma Thuot – Dak Lak City

(2) Department of Physics, Ho Chi Minh City University of Pedagogy, 280 An Duong Vuong, District 5, Ho Chi Minh City

Using the molecular dynamics method within Born-Oppenheimer approximation implemented in the GAUSSIAN, we simulate the imino-amino tautomerism of cytosine, one of four bases of the DNA molecule. We have also calculated high-order harmonics, emitted from cytosine while interacting with ultra-short 800 nm laser pulses along the chemical reaction path of the tautomerism by the strong-field approximation using Lewenstein model. We identify that the calculated high-order harmonic spectra have intensity peaks nearby the stable states (imino and amino) as well as the transition state. This finding may be a useful tool for tracking the DNA tautomerism, one of reasons for gene mutation.

P-32. Temperature and environmental services affect to so me of


52

thermodynamics of biological DNA pendulum

P.T. Trang, N.T.H. Trang, T.T. Thao, N.V. Thanh, an d N.A. Viet

Hanoi University of Education, Institute of Physics, 10 Đào Tấn, Ba Đình, Hà Nội

A human circadian rhythm: daily temperature oscillation of body was studied in frame work of the microscopic model Peyrard-Bishop of DNA. Using the temperature dependence of the effective masses of DNA quasi-particles we found that there are four main circadian oscillations of human body with periods of a quarter, one third, half and full day. This result in agreement with traditional Eastern medical theory about active rhythm of human organisms and might be useful in some practical treatments. Besides, we also examined the effect of density of charged particles in the environment surrounding the DNA on the DNA thermodynamic properties

P-33. Phương pháp toán t ử FK cho bài toán nguyên t ử Hydro trong t ừtrường v ới cường ñộ bất kỳ

Lý Duy Nh ất, Huỳnh Nguy ễn Thanh Trúc, Nguy ễn Văn Hoa, Nguy ễn Phương Duy Anh, Lê V ăn Hoàng

Khoa Vật Lý, Trường Đại học Sư Phạm TP Hồ Chí Minh 280, An Dương Vương, Quận 5, TP Hồ Chí Minh

Tóm tắt: Sử dụng phương pháp toán tử FK ñể tính năng lượng và hàm sóng cho bài toán nguyên tử hydro trong trường từ với cường ñộ bất kỳ. Dùng sơ ñồ vòng lặp ñể tính các bổ chính bậc cao và so sánh các kết quả với kết quả của các tác giả khác. Với trạng thái cơ bản và các trạng thái kích thích bậc thấp chuỗi các bổ chính hội tụcho nghiệm chính xác bằng số.

P-34. Phương pháp toán t ử FK gi ải ph ương trình Schrodinger cho nguyên t ử Hydro

Bùi Nguy ễn Ngọc Thúy, Nguy ễn Đình Lu ật, Cao Hồ Thanh Xuân , Nguy ễn Văn Hoa, Lê V ăn Hoàng

Khoa Vật Lý, Trường Đại học Sư Phạm TP Hồ Chí Minh 280, An Dương Vương, Quận 5, TP Hồ Chí Minh

Tóm tắt: Phương pháp toán tử FK với phép biến ñổi Laplace ñược sử cho bài toán nguyên tử hydro. Các mức năng lượng ñược tính chính xác bằng số tới bậc tùy ý theo sơ ñồ vòng lặp và ñược so sánh với kết quả chính xác. Kết quả này cho thấy triển vọng ứng dụng phương pháp toán tử FK cho các bài toán hệ nguyên tử.

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P-35. The use of Drude- Lorentz model in determining resistivity of ultra-thin TiN films

Bui Van Hao, Nguyen Ngoc K hoa Truong, Tran The Nam, Nguyen Thi Minh Phuong, and Doan Minh Thuy

Faculty of Physics and Industrial Technology, Quy Nhon University, Vietnam

In this work, we present the application of Drude - Lorentz theory in analyzing experimental spectroscopic ellipsometry data to determine the resistivity of ultra-thin titanium nitride films. The films were deposited on silicon substrates at 350 oC using atomic layer deposition technique. The growth of the films was in situ monitored by spectroscopic ellipsometry from which the complex dielectric functions of the layers were determined. The measured dielectric functions were parameterized by employing the Drude - Lorentz model in combination with the COMPLETEEASE modeling software. The resistivity of titanium nitride was extracted from the parameterization. A resistivity of 160 microohm-cm was obtained for a 10 nm thick film. The resistivity slightly decreased with increasing film thickness and reached values of 150 and 145 microohm-cm for films with thicknesses of 15 and 20 nm, respectively.

P-36. Femtosecond Supercontinua Generated in Birefringent Photonic Crystal Fibers

LECONG Nhan

University of Sai Gon

Supercontinua (SC) generated in photonic crystal fibers (PCF) have emerged in the past years as attractive light sources for optical coherence tomography [1], non-linear microscopy [2,3] and ultrafast spectroscopy [4,5]...For the latter application, we have developed a pump-probe experiment based on sub-cm birefringent PCF [6]. We report here on new findings, obtained by studying the spectro-temporal properties of the SC as a function of fiber length. We show that the SC, generated in the core of the birefringent PCF, has a linear polarization and the spectrum extends on the UV (340 nm) can be obtained for the injection laser pulses in the glass interstitials. The birefringent PCF in this work was produced at the XLIM laboratory (Limoges, France) by using the standard stack-and-draw method. This fiber has an asymmetric core which induces strong birefringence, thus the light output in this core has a linear polarisation. The cladding is composed by a periodic micro structure made of air holes and silica. Guiding takes place in the core, but is


54

also possible in the cladding interstitials. Light propagation undergoes the material dispersion and guiding dispersion. This PCF has four zero-dispersion wavelength (ZDW) at 866, 827, 764 and 757 nm respectively for four different modes LP01y, LP01x, LP11y and LP11x. Femtosecond SC generation in the PCF only requires laser pulses of a few nJ for injection. Our laser source is a Ti:Al2O3 oscillator. Thanks to the micro structure, the light is confined in a small diameter of silica, the abnormal dispersion favors the soliton propagation. Those enhance the non linear phenomena like: self phase modulation, cross phase modulation, four wave mixing, Raman stimulation, soliton propagation…which are responsible for the SC generation. By studying the SC properties generated in one of the interstices and in the core we have found that the SC generated in the interstice extends more in the blue than the SC generated in the core. The larger spectral coverage is most probably due to the smaller diameter of the cladding structures, which afford for a shorter zero dispersion wavelength.

P-37. Hidden Symmetry and Runge-Lenz Vector for the Nine -Dimensional Micz-Kepler Problem

Phan Ngoc Hung and Le Van Hoang

Ho Chi Minh City University of Pedagogy

Considering the nine-dimensional MICZ-Kepler problem, we establish the Runge-Lenz vector that describes the hidden symmetry of the problem. We also build the group of the hidden symmetry SO(10), which Casimir operators are established that allow us to investigate the problem by the algebraic method.

P-38. The Effects of the Squeezed Field on the Dispersive and Absorptive Properties of a Three-Level Medium

Thai Doan Thanh , Nguyen Tuan Anh and Tra ng Huynh Dang Khoa

Ho Chi Minh City University of Food Industry

In this paper we have discussed the effect the squeezed field in a V-type atom with nearly degenerated excited levels, driven by a strong coherent field. We have found that the squeezed field induces a notable influence on the dispersive and absorptive properties. For suitable values of the squeezed field parameters we found a nearly zero plateau in both the absorption and dispersion curves, which allows the propagation of nearly dispersionless and distortionless pulses. Furthermore, we have found that the probe absorption can be

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achieved dependinng on the intensity of a coherent.

P-39. Influence of the Fraction of Stokes and Anti- Stokes Intensities on Beam of Trio-Cavity Raman Laser

Ho Quang Quy(1), Mai Van Luu(2), Nguyen Thai Bang(3 )

(1) Academy of Military Science and Technology

(2) University of Vinh

(3) Third High College of Anhson

The expressions of thermal and refraction index distributions in the trio-cavity Raman laser are presented. With cavity construction, those are used to derived the waist of Stokes output beam. The influence of fraction of Stokes and anti-Stokes intensities on beam waist are simulated and discussed.

P-40. Molecular Dynamic Simulation of Amorphous SiO2 unde r Pressure

Huy N. V., Nhan N. T., Hoa N. T., Hung P.K.

Hanoi University of Science and Technology

A simulation study was carried out for amorphous SiO2 at temperature of 300 K under pressure from 0 to 60 GPa. The solubility of noble gasses into the SiO2 glass was computed assuming that only large non-overlapping simplexes can contain a noble atom. The calculation shows a good agreement with experimental data of noble solution in silica glass. The local structure of silica is analyzed through the scattering structure factor S(q) and simplex statistic. We found that the first sharp diffraction peak S(q) shifts to larger value qwith increasing the density of silica. This relates to the change in amount of large simplexes. The densification mechanism of silica is also analyzed and discussed here.

P-41. Study on Physical Properties of Nano Iron

Nhan N. T., Huy N. V, Hung. P. K.

Hanoi university of Science and Technology

The atomic model of nanoparticle consisting of 3000 atoms is constructed by molecular dynamic method using embedded-atom potential. The local structure is analyzed through the partial pair distribution function, coordination number, simplex statistics and density profile. It was found two shells of nanoparticles of which the structure significantly differ each other. The glass transition


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temperature is computed based on the temperature dependence of potential energy with nanoparticle size. The result shows that the glass transition temperature increases from 800 to 1050 K as the nanopartice size increases

P-42. Aggregation of short peptides in the tube model of proteins

Nguyen Ba Hung(1) , Trinh Xuan Hoang(2)

(1) Department of Physics and Biophysics, Vietnam Military Medical University, 104 Phung Hung, Ha Dong, Hanoi, Vietnam

(2) Center for Computational Physics, Institute of Physics, VAST, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam.

The ability of proteins to aggregate and form toxic amyloid fibrils has been associated with a range of diseases including BSE (or mad-cow), Alzheimer’s and Parkinson’s Diseases. In this study, we investigate the aggregation mechanism of short peptides by using the tube model for hydrophobic-polar (HP) sequences. Extensive Monte Carlo simulations are carried out with the use of parallel tempering technique. Our results show that the conversion from disordered aggregates to cross-link beta-structures depends on the HP sequence and the number of peptides. Comparison to the homopolymer case shows that the HP sequence enhances the propensity of forming fibrillar structures leading to more ordered alignment of peptides.

P-43. Molecular Dynamics simulation of cotranslational pr otein folding in a coarse-grained model

Bui Phuong Thuy (1,2), Nguyen Thuy Nhung(2), and Trinh Xuan Hoang(2)

(1) Nam Dinh University of Technology Education, Phu Nghia, Loc Ha, Nam Dinh, Vietnam

(2) Center for Computational Physics, Institute of Physics, VAST, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam

Although protein folding has been studied intensively for more than 50 years, the early stages of folding during and after translation in vivo remain elusive. Recent advances in experiments and theory have supported the cotranslational folding hypothesis. In this study, we investigate the non-equilibrium process in which the polypeptide chain grows and is gradual extruded from ribosomal tunnel until the native state of full-length protein is acquired. The simulations are carried out by using a coarse-grained Go model and Molecular

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Dynamics method with Langevin equation. Our results show that for some proteins the growth process during translation increases folding efficiency and thus helps avoiding misfolding in vivo.

P-44. Folding of thick Hydrophobic Membranes

Trinh Xuan Hoang(1), Jayanth R. Banavar(2), Amos Ma ritan(3)

(1) Institute of Physics, VAST, 10 Dao Tan, Ba Dinh, Hanoi, Vietnam

(2) Pennsylvania State University, 104 Davey Lab, University Park, PA 16802, USA

(3) Universita di Padova and INFM, Via Marzolo 8, Padova 35131, Padova, Italy

We introduce and study the behavior of a tethered membrane of non-zero thickness embedded in three dimensions subject to an effective self-attraction induced by hydrophobicity arising from the tendency to minimize the area exposed to a solvent. The phase behavior and the nature of the folded conformations are found to be quite distinct in the small and large solvent size regimes. We demonstrate spontaneous symmetry-breaking with the membrane folding along a preferential axis, when the solvent molecules are small compared to the membrane thickness. For large solvent molecule size, a local crinkling mechanism effectively shields the membrane from the solvent, even in a relatively flat conformation.

P-45. Molecular Dynamics Simulation the Function of Neuro globin

To Thi Thao, Ngo Van Thanh, Chu Thuy Anh and Nguyen Ai Viet

Institute of Physics, 10 Dao Tan, Ba Dinh, Ha Noi, Vietnam

The discovery recently of neuroglobin (Ngb), expressing in the cytoplasm of nerve cells in the brain and in the retina of vertebrates, is a identified member of the globin superfamily. Although Ngb has less than 16% sequence identify with haemoglobin (Hb) and myoglobin (Mb), they are globins transport/stock oxygen. One know that it can be protect the nerve against the decrease of oxygen or NO toxicity..., however, the function of Ngb is still unclear. In this work, we use the molecular dynamics simulation to study the binding of ligand CO to the ferrous Ngb which shows the insight to the function of Ngb

P-46. Pathology Model of HIV Infection with long- term Periodic Treatment


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D. T. Huong, N. L. Hoai, N. A. Viet


A dynamical model describes the dependence of drug effectiveness on time parameter has been built. The research based on the number of uninfected T-cells. The model showed that the continous treatment using the combination of two therapies gives effective result: number of the T-cells increases to the point where the infection symptoms are disappeared

P-47. Ward-Takahashi Identity for Vertex Functions of Sqe d

Ha Thanh Hung, Le Tho Hue and Hoang Ngoc Long

Center for Theoretical of Physics, Institute of Physics, VAST, P. O. Box 429, Bo Ho, Hanoi 10000, Vietnam

Ward-Takahashi identity is useful tool for calculating amplitude of scattering processes. In the high-order perturbative theory of sQED, propagators and vertex functions include many high-order corrections. By using Ward-Takahashi identity, we separate each vertex function into two parts: "longitudinal" component and "transverse " part. " Longitudinal" part can be directly calculated from Ward-Takahashi identity and it does not depend on perturbative orders of the theory, but the remain does depend on. This paper will present one method based on the Ward-Takahashi identity, which depends on specific orders of the theory, to calculate propagators and vertex functions at 1-loop order in arbitrary gauge as well as dimension in sQED

P-48. Vector of Polarization of Scattering of Neutrons in Paramagnetic Crystal

Do Thu Trang, Nguyen Dinh Dung

Hanoi University of Science, VNU

In this article, the cross-section of magnetic of polarized neutrons and change of polarization of scattering neutron in paramagnetic crystal are abtained. In order to study this problem the method of nuclear optics of polarized matter have been used. We showed that the cross-section of magnetic scattering of neutron in this crystal have important information about correlative function of electron lattice nodes

P-49. Magnetic Scattering of Polarized Neutrons and Polar ized Vector of Scattering Neutrons in Ferromagnetic Crystals

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Nguyen Thanh Nga, Nguyen Dinh Dung

College of Science, VNU

In this article, the magnetic scattering of polarized neutrons on ferromagnetic crystals is studied. In order to study this problem the method of nuclear optics of polarized matter have been used. We obtained the differential cross-section of magnetic scattering of polarized neutrons and polarized vector of magnetic scattering neutrons in ferromagnetic crystals. We showed that, the differential cross-section of magnetic scattering of polarized neutrons and polarized vector of magnetic scattering neutrons in ferromagnetic crystal have important information about correlative function of electron lattice nodes spins.

P-50. Polarized Vector of Scattering Neutrons in Cry stal with Magnetic Helicoidal Structure

Pham Thi Thu Ha, Nguyen Dinh Dung

Department of Physics , College of Science, VNU

In this article, the differential cross-section of magnetic scattering of polarized neutrons and change of polarization of neutron in crystal with magnetic Helicoidal structure are studied. In order to study this problem the method of nuclear optics of polarized matter have been used. We obtained the differential cross-section of magnetic scattering and change of polarization of neutron and showed that the differential cross-section of magnetic scattering and polarized vector of scattering neutron contain important information about correlative functions of the electron lattice nodes spins.

P-51. Radion Production at Compact Linear Collider based on gamma -Electron Collisions

D.V.Soa, D.L.Thuy, N.H.Thao, T.D.Tham nd B.T. Giang

Hanoi National University of Education

We analyze the potential of compact linear collider ( CLIC) based on gamma-electron collisions to search for the light radion in the Randall -Sundrum ( RS ) model, where compactification radius of the extra dimension is stabilized by radion, which is a scalar field lighter than the graviton Kaluza-Klein states. The results show that the production cross - section can give observable values at high energies in future colliders with the high polarization of electron beams

P-52. Saxion mass in the SUSY Axion Model and Saxion Prod uction in


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high Energy Collisions

D.L.Thuy, L.N.Thuc, T.D. Tham and B.H.Giang

Hanoi National University of Education

We give constraints on the saxion mass in the SUSY axion model. Based on the result, the saxion production in the high energy gamma-gamma collisions and the saxion decay into two photons will be calculated in detail . The results show that the saxion is stable in our universe and at the low bound of the saxion mass it can be a new candidate for the cold dark matter.

P-53. Thermodynamic Pairing and its Influence on Nuclear Level Density

Nguyen Quang Hung(1,2), Dang Thi Dung(2), Tran Dinh Trong(2).

(1) Tan Tao University, Tan Tao University Avenue, Tan Duc Ecity, Duc Hoa, Long An

(2) Center for Nucler Physics, Institute of Physics, VAST, No 10 Dao Tan, Ba Dinh, Hanoi.

Thermodynamic properties of some selected even-even nuclei such as $^56$Fe, $^60$Ni, $^98$Mo, and $^116$Sn are studied within the Bardeen-Cooper-Schrieffer theory at finite temperature (FTBCS) taking into account pairing correlations. The theory also incorporates the particle-number projection within the Lipkin-Nogami method (FTLN). The level densities are derived based on the statistical theory of the grand-canonical ensemble (GCE). The results obtained are compared with the recent experimental data by Oslo (Norway) group. It is found that pairing correlations have significant effects on nuclear level density, especially at low and intermediate excitation energies.

P-54. Electron effective mass renormalization in high- photoexcited quantum wire with double plasmon-pole approximation

Thi Tran Anh Tu, Nguyen Huu Tung, and Cao Huy Thien

Ho Chi Minh City Institute of Physics

Dynamical screening in a high-photoexcited quantum wire is treatedin double plasmon-pole approximation. We calculate the electron self-energy and effective mass renormalization at finite temperature. Numerical results for the electron self-energy and effective mass renormalization are reported.

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P-55. Amplitude and phase dynamics of spin- degenerated polariton condensate in semiconductor microcavities

Mai Hoang Linh Phi and Cao Huy Thien

Ho Chi Minh City Institute of Physics

The complex Gross-Pitaevskii equations for amplitude and phase of spin-degenerated polaritons condensate in semiconductor microcavities are built within spinor polariton model. These equations have been obtained by adiabatic elimination the corresponding three-point polarizations with p-p scattering as the dominant mechanism. If neglecting scattering terms, our results is agreement with calculation of M.O.Borgh et al. Together with the solutions the Boltzmann equations for the excited states, our result will form the basis for a complete evaluation of the linewidth and the second-order correlation function.

P-56. Influence of Solvents on Spin Transition of FeII Sp in-crossover Molecule

Nguyen Anh Tuan

Faculty of Physics, Hanoi University of Science, Vietnam National University, 334 Nguyen Trai, Thanh Xuan, Hanoi, Vietnam

We present a density-functional study of the geometric structure, electronic structure and spin transition of the room-temperature FeII spin-crossover molecule, i.e., [Fe(abpt)2(tcm)2] with abpt = 4-amino-3,5-bis(pyridin-2-yl)-1,2,4-triazole and tcm– = [C(CN)]– = tricyanomethanide anion. To investigate influence of surrounding chemical environment on spin transition of this molecule, we studied the electronic structure and spin transition of this molecule with different solvents. Our calculated results demonstrated that typical parameters of spin-transition of this molecule are varied as a function of dielectric constant of solvents.

P-57. The Hubbard - Stratonovich transformation and relevant order parameters

Nguyen Tri Lan

Institute of Phyics, 10 Dao Tan, Ba Dinh, Ha Noi, Vietnam

The Hubbard - Stratonovich transformation of many - body theory is reconsidered in various versions. Learning from its failures in coping with competing channels of collective phenomena, a combined Hubbard - Stratonovich transformation is proposed to overcome these difficulties. That yields a variety of fluctuating collective


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quantum fields describing the competition of different phases in the system under consideration. As a consequence of results, the validity of the Hubbard - Stratonovich transformation and its relation to a given order parameter are discussed.

P-58. Dielectric Function of a Semiconductor Quantum Wire

Vetpany Sivongxay, Nguyen Nhu Dat

Institute of Physics,Hanoi

The dielectric function is derived within the framework of the Random Phase Approximation for an electron gas in a semiconductor quantum wire taking in to account the difference in the background dielectric constant of the wire and the barrier materials.

P-59. Antiferromagnetic Heisenberg spin- ½ model on a triangular lattice in a magnetic field

Pham Thi Thanh Nga(1)and Nguyen Toan Thang(2)

(1) Water Resources University, 175 Tay Son, Hanoi

(2) Institute of Physics, VAST, 10 Dao Tan, Hanoi.

The functional integral approach of Popov-Fedotov is applied to a quantum antiferromagnetic Heisenberg spin-½ model on a triangular lattice in the presence of an in-plane magnetic field. We calculate the ground state energy, sublattice, and uniform magnetizations. We find that the quantum fluctuation is enhanced as the magnetic field increases at the intermediate field strength.

P-60. Thermodynamic theory for few-atomic-layer ferromagn etic films

Pham Huong Thao (1,2) and Bach Thanh Cong (1)

(1) Faculty of Physics, Hanoi University of Science, 334 Nguyen Trai, Hanoi, Vietnam (2) Faculty of Physics, Hue University of Education, 34 LeLoi, Hue, Vietnam

The functional integral method and Heisenberg model for localised spins were used for calculation of the thermodynamic characteristics of few-atomic-layer ferromagnetic films such as magnetization, fluctuation corrections, spin wave spectra. The dependence of the magnetization of the films on the temperature, for various numbers of monatomic layers of the thin films is studied in mean field theory and after that these results are compared with the case of considering the mean fluctuation of the magnetization. The second-order fluctuation correction give the Green’s function in the Gaussian approximation,

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and the poles of the transverse Green’s function determine the spin wave spectra of the films in this approximation.

P-61. Transport Properties of a spin-polarized Quasi-two- Dimensional Electron gas in an InP/In_1- xGa_xAs/InP Quantum well Including Temperature and Correlation Effects

Nguyen Quoc Khanh, Mai Thanh Huyen

Trường Đại học KHTN TP HCM, 227 Nguyễn Văn Cừ, Quận 5, TP Hồ Chí Minh. Điện thoại và e-mail liên lạc của tác giả trình bày: 01693245880, [email protected]

We investigate the mobility and resistivity of a quasi-two-dimensional electron gas in an InP/In_1-xGa_xAs/InP quantum well at arbitrary temperatures and spin polarizations caused by an applied in-plane magnetic field. We consider the carrier density, impurity concentration and layer thickness parameters such that the ionized impurity and alloy disorder scattering are the main mechanisms. We investigate the dependence of the mobility and resistivity on the carrier density, layer thickness and magnetic field. We include the many-body effects using the three-sum-rule version of the self-consistent approach of Singwi, Tosi, Landand and Sjolander. We discuss the multiple-scattering effects and critical density of the metal–insulator transition.

P-62. Coulomb Drag Resistivity in Bilayer 2D hole Systems

Nguyen Quoc Khanh, Mai Thanh Huyen

Department of Theoretical Physics, University of Natural Sciences in Ho Chi Minh City

We investigate the Coulomb drag resistivity in dilute bilayer 2D hole systems including local field effects in the framework of Fermi liquid theory. We study the dependence of Coulomb drag resistivity on the carrier density, temperature, quantum well width and inter-layer distance using the RPA and Hubbard approximation. In special case our results reduce to those obtained by Hwang and coworkers ( Phys. Rev. Lett. 90, 086801 (2003)). Our results and future experiments will give information about the many-body effects in two-dimensional systems.

P-63. Influence of Laser Radiation on the Absorption of a Weak Electromagnetic Wave by Confined Electrons in Doped Superlattices

Nguyen Thi Thanh Nhan(1), Le Thi Luyen(1), Nguyen V u Nhan (2),


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and Nguyen Quang Bau(1)

(1) Department of Physics, College of Natural Sciences, Hanoi National University

(2) Department of Physics, Academy of Defence force – Air force

The absorption coefficient of a weak electromagnetic wave by confined electrons in the presence of laser radiation in doped superlattices is calculated by using the quantum kinetic equation for electrons. The analytic expressions of the absorption coefficient of a weak electromagnetic wave in the presence of laser radiation field for the case of electron – optical phonon scattering are obtained. The dependence of the absorption coefficient on the intensity and frequency of the external laser radiation, the intensity and frequency of the weak electromagnetic wave, the temperature T of the system are analyzed. The results are numerically calculated, plotted, and discussed for n-GaAs/p-GaAs doped superlattices. The appearance of a laser radiation causes surprising changes in the absorption coefficient. All the results are compared with those for the normal bulk semiconductors to show the difference. Keywords: Absorption Coefficient, Doped Superlattices.

P-64. The Amplification of Confined Sound (Confined Acous tic Phonons) by Absorption of Laser Radiation in a Cyli ndrical Quantum Wire with an Infinite Potential

Nguyen Dinh Nam(1), Nguyen Thi Quyen (1), Le Thi Thu Phuong(1), Nguyen Vu Nhan(2), Dinh Quoc Vuong (3), Nguyen Quang Bau(1)

(1) Department of Physics, College of Natural Sciences, Hanoi National University, Hanoi, Vietnam

(2) Department of physics, Academy of Defence force-Air force, Hanoi, Vietnam

(3) Quangninh Department of Education and Training, Quangninh, Vietnam

Based on the quantum kinetic equation for the confined phonons, the amplification of confined sound (confined acoustic phonons) by absorption of a laser radiation in a cylindrical quantum wire with an infinite potential is studied for the case of monophoton absorption process and the case of multiphoton absorption process. Analytical expressions and conditions for the rate of confined acoustic phonons are obtained. Differences between the two cases of monophoton and multiphoton absorption process are discussed; numerical

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computations and plots are carried out for a GaAs/GaAsAl quantum wire. The results are compared with bulk semiconductors and quantum wells.

P-65. The Influences of Confined Phonons on The Nonlinear Absorption Coefficient of a Strong Electronmagnetic Wave by Confined Electrons in Cylindrical Quantum Wires with the parabolic holes.

Le Thai Hung, Duong Thi Lan, Nguyen Thi Thu Hien , Nguyen Thi Thanh Nhan and Nguyen Quang Bau

Department of Physics, College of Natural Sciences, Hanoi National University, No.334,Nguyen Trai Str, Thanh Xuan Dist, Hanoi, Vietnam.

Abstract. The influences of confined phonons on the nonlinear absorption coefficient (NAC) of a strong electronmagnetic wave (EMW) by confined electrons in cylindrical quantum wires with the parabolic hole is theoretically studied using the quantum transport equation of elctrons. The dependence of the NAC on the radius of quantum wires (R), the amplitude ( E0) of external strong EMW, the temperature (T) and the frequency Ω of external strong EMW of the system in case of the confined phonons is obtained. Two cases for the absorption: close to the absorption threshold and far away from the absorption threshold are considered. The formula of the NAC contains the quantum numbers k, m characterizing confined phonons and is easy to come back to the case of unconfined phonons when k, m reaches to zero and the linear absorption when E0 reaches to zero. The analytic expressions of the NAC are numerically evaluated, plotted and discussed for a specific case of the GaAs/GaAsAl quantum wire.The computations show that the value of the NAC in the case of confined phonons strongly depends on k, m. The spectrums of the NAC are very different from the linear absorption.

P-66. Mott-Hubbard transitions in the two- band Hubbard model: A coherent potential approximation study

Le Duc Anh(1), Hoang Anh Tuan(2)

(1) Department of Physics, Hanoi National University of Education

(2) Institute of Physics, PO Box 429, Bo Ho, Hanoi 10000, Vietnam

The half-filled isotropic degenerate two-band Hubbard model is studied within coherent potential approximation. The model is characterized by an Ising-type Hund’s exchange coupling, intra- and inter-orbital Coulomb parameters. We found that the presence of


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inter-orbital interaction reduces the Mott-Hubbard critical value UC

When the Hund’s exchange coupling is large enough we found a metallic region in the insulating domain. We reveal that the system can have two distinct critical values for Mott-Hubbard transitions.

P-67. Individual Deduction of two roughness Parameters fo r Quantum wells from Intersubband Absorption peak data

Nguyen Thanh Tien(1), Dinh Nhu Thao(2)

(1) College of Science, Can Tho University, 3-2 Road, Can Tho City, Vietnam

(2) Department of Physics, Teaching College, Hue University, 34 Le Loi Street, Hue City, Vietnam

For roughness-dominated intersubband absorption in quantum wells, the optical characteristics depend on roughness parameters of the heterointerface (roughness amplitude and correlation length). Following the earlier belief in the literature, a single-valued estimation of them from measurement of these characteristics is impossible. On the contrary, in our report we present an attempt at providing a possibility for single-valued deduction of the roughness parameters from optical data. For this purpose, we introduce the lineshape characteristics that are independent of roughness amplitude, so being a function of correlation length only. As a typical example, we examine the ratio between two different absorption-peak heights. Thus, we may propose an efficient method for individual estimation of the roughness parameters from optical data. Instead of the normal simultaneous fitting of both parameters to the functional dependence of the absorption-peak height at many experimental points, we perform a two-step fitting of (i) correlation length to the peak height ratio at one point, and then (ii) roughness amplitude to the peak height at one point.

P-68. Effect of the Direct Exchange Interaction between M agnetic Impurities on Magnetization in Diluted Magnetic sem iconductors

Vu Kim Thai(1,3) , Le Duc Anh(2) and Hoang Anh Tuan (1)

(1) Institute of Physics, VAST (2) Hanoi National University of Education (3) University of Economic and Technical Industries

We consider a model of III-V diluted magnetic semiconductors where both of the exchange interaction between carrier and impurity spins, and the direct exchange interaction betwwen magnetic impurities are taken into account. The magnetization as a function of temperature for a wide range of model parameters is calculated and disscused.

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We show that for a degenerate carrier system the supresion of the magnetization is sensitive to the antiferromagnetic coupling constant and the impurity concentration.

P-69. Curie Temperature of Diluted Magnetic Semiconductor s: the Fluence of the Antiferro magnetic Exchange Interaction between Magnetic Impurities

Vu Kim Thai(1,3), Le Duc Anh(2) and Hoang Anh Tuan( 1)

(1) Institute of Physics, VAST

(2) Hanoi National University of Education

(3) University of Economic and Technical Industries

The coherent potential approximation and mean field approximation are used to calculate the free energy of the coupled carrier –localized spin system in III-V diluted magnetic semiconductors. Thus the magnetic transition temperature Tc can be determined and its dependence on important model parameters. We show that the strong antiferromagnetic superexchange interaction between nearest neighbor sites considerably reduces the Curie temperature.

P-70. Parametric Re sonance of Acoustic and Optical Phonons in a Compositional Semiconductor SuperLattice

Luong Van Tung

Dong Thap University

The parametric resonance of acoustic and optical phonons in a Compositional Semiconductor superlattice with non-degenerative electron gas in the presence of a laser field is theoretically predicted by using a set of quantum transport equations for the phonons. Dispersions of the resonant phonon frequency and the threshold amplitude of the field for parametric amplification of the acoustic phonons are obtained. If they are obtained, then they are also estimated for realistic semiconductor models

P-71. Study on Mechanical and Thermodynamic Property of M olecular Cryocrystals CO2 and N2O under Pressure

Nguyen Quang Hoc(1), Hoang Van Tich (1) and Nguyen Duc Hien(2)

(1) Hanoi National University of Education, 136 Xuan Thuy, Cau Giay, Hanoi, Vietnam


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(2) Tay Nguyen University 456 Le Duan, Buon Me Thuot City

The mechanical and thermodynamic properties (such as the nearest neighbor distance ,the molar volume, the adiabatic and isothermal compressibilities, the thermal expansion coefficient, the specific heats at constant volume and at constant pressure) of some cryocrystals CO2, N2O with face-centered cubic structure at various temperatures and pressures up to 10 GPa are investigated by the statistical moment method (SMM) in statistical mechanics and are compared with the experimental data.

P-72. Boron and Phosphorus Diffusion in Silicon: Pressure Dependence

Phan Thi Thanh Hong(1) and Vu Van Hung(2)

(1) Hanoi Pedagogic University N0-2, Xuan Hoa, Phuc Yen, Vinh Phuc

(2) Hanoi National University of Education, 136 Xuan Thuy St, Cau Giay, Hanoi.

The effects of pressure on diffusion of impurities in silicon crystal are investigated by using the statistical moment method (SMM). Pressure dependence of diffusion coefficient, D, is characterized by an activation volume, V*. Numerical results for B and P diffusion in silicon are performed and compared to experimental data showing the good agreement.

P-73. Calculation of Physical Parameters of real Atomic V ibration of fcc Crystals Doped by Atoms of other Crystals using Effective Potential

Nguyen Van Hung, Tong Sy Tien, and Le Hai Hung

Department of Physics, Hanoi University of Science, VNU Hanoi.

Abstract: A new procedure for calculation and analysis of physical parameters of real atomic vibration of fcc crystals doped by atoms of the other crystals has been developed using anharmonic effective potential. Analytical expressions for dispersion relation separating acoustic and optical branches; forbidden zone; effective force constant; Debye frequency; phase shift and amplitude of real vibration of atomic chain containing doping atom have been derived. They contain Morse potential parameters for doping crystal characterizing vibration for each pair of atoms. Numerical calculations have been carried out for Cu doped by atoms of some other crystals, where the results for Cu doped by Ni agree well with

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fundamental properties of these quantities and with experimental values extracted from measured Morse parameters.

P-74. Calculation of XAFS Cumulants of bcc Cr ystals based on Anharmonic correlated Debye Model

Nguyen Bao Trung, Nguyen Van Hung, and Nguyen Cong Toan

University of Science, VNU

Anharmonic correlated Debye model (ACDM) has been generalized to study X-ray absorption fine structure (XAFS) cumulants of bcc crystals taking into account the anharmonic effects of the lattice vibrations where the anharmonic effective potential for bcc crystals has been developed. Morse potential is included to perform interaction of each atomic pair. Analytical expressions for the mean square displacement (MSD) $$, and the cumulants $(\sigma^(1), \sigma^(2)$ have been derived. Numerical results for $(\sigma^(1), \sigma^(2)$ of Cu are found to be in good agreement with experiment and with those of the other theoretical calculations.

P-75. Entanglement Dynamics of the Independent Cavity-qub it System

Nguyen Van Hop

Faculty of Physics, Hanoi National University of Education

In this article, unlike previous studies, we study the full quantum entanglement dynamics problems of the independent qubit-cavity system while under the influence of three physical mechanisms of the decoherence: the relaxation of excited electrons, the pure dephasing of coherent oscillations of electron population at two energy levels and the photon leakage. The results we obtained indicate that phase flip mechanism, while not losing the energy of the system but to lose information, so this mechanism is an important that not be ignored. Speed decay of the quantum entanglement system depends on the constant interaction with the environment. Quantum entanglement of the independent qubit-cavity system depends on the location of the qubit in the cavity electromagnetic field.

P-76. Adsorption Structures of Hali de Anions and Porphyrins on a Copper Electrode Studied by in Situ Scanning Tunnel ing Microscopy

Phan Thanh Hai(1,2), Doan Minh Thuy(2) and Klaus Wa ndelt(1)

(1) Institute of Physical and Theoretical Chemistry, University of


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Bonn, Germany

(2) Department of Physics, Quynhon University, Vietnam

The structures of adsorbed halide monolayers, e.g. chloride, iodide as well as some organic molecules on a Cu(100) electrode have been investigated by a combination of cyclic voltammetry (CV) and electrochemical scanning tunneling microscopy (EC-STM). The potential range of the copper electrode in electrolytes is limited by two chemical reactions, (i) the oxidative copper dissolution reaction (CDR) at the anodic limit and (ii) the reductive hydrogen evolution reaction (HER) at the cathodic limit. While a featureless CV curve is characteristic in pure hydrochloric acid, drastic changes in the CV curves are observed in the iodide and organic molecules containing solutions, indicating the formation of a two-dimensional CuI film or redox reactions of the organic molecules. While chloride anions form a simple c(2 x 2) structure on the Cu(100) electrode, an electrocompressible c(p x 2) structure of adsorbed iodide is found, which at anodic potentials at the onset of copper dissolution transforms into the two-dimensional CuI compound. Using the respective halide covered and modified Cu(100) surface as a template for the adsorption of the organic molecules the dynamics of the adsorption process and the structure of the co-adsorbed porphyrin layers has been investigated with submolecular resolution. The results not only provide data about the structure of the adsorbed organic overlayer but also enable its correlation with the template structure underneath. Based on these informations structure models are proposed for the various adsorbate layers which could serve as input in theoretical simulations.

P-77. Entanglement in Fermi gas and BCS systems

Le Thi Truc Phuong, Phan Minh Truong, and Ho Trung Dung

Ho Chi Minh city Institute of Physics

Besides being of fundamental interest, entanglement is an important resource in quantum communication and information processing. The properties of the entanglement in many-body systems have attracted much attention recently. Using separability conditions in the form of inequalities derived by Hillery and coworkers, we explore the bipartite entanglement in noninteracting Fermi gas and Bardeen–Cooper–Schrieffer (BCS) superconducting systems at zero temperature. It is shown that these conditions can detect entanglement between two particles at different positions in the ground state of a Fermi gas and between two particles within an electron pair in the ground state of a BCS system.

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P-78. Magnetic field dependence of magnetic Casimir effec t (MCE)

Do Phuong Lien(1) Nguyen Tuan Anh(2), Nguyen Anh Tu an(2)

(1) Institute of Engineering Physics (IEP), Hanoi University of Technology (HUT); 1, Dai Co Viet Road, Hai Ba Trung Dist., Hanoi, Vietnam

(2) International Training Institute for Materials Science (ITIMS), Hanoi University of Technology (HUT); 1 Dai Co Vi

In this work, we study the Casimir force F between two parallel ferromagnetic plates in presence of an external magnetic field. The magnetic field dependent dielectric permittivity of metals is described using the Drude model approache. The dependence of the Casimir force on magnetic field strength (via cyclotron frequency) is calculated with different separation distances of plates, D. Results show that the Casimir force increases as function of the cyclotron frequency with a parabolic law. We also investigate the effect of the magnetic field direction (defined by the angle, φ, between the magnetic field direction and the surface normal of the plates) on the Casimir force at different distances D. It is showed that the Casimir force decreases when the angle φ increases by a Gaussian law. These behaviors are discussed.

P-79. Khảo sát ảnh h ưởng c ủa kích th ước lê tính ch ất vòng c ộng hưởng h ở

Võ Trung Kiên, Nguy ễn Huỳnh Tu ấn Anh

Khoa Vật lý-Vật lý kỹ thuật, Đại học khoa học tự nhiên, ĐHQG Tp. HCM

Cấu trúc vòng cộng hưởng hở (Split Ring Resonator) bằng nhôm phủ lên ñế phẳng ñược mô phỏng bằng phần mềm CST Microwave Studio. Sự biến ñổi của tần số cộng hưởng ñược khảo sát chi tiết qua sự thay ñổi kích thước vòng (ñường kính ngoài, ñộ rộng, khoảng hở giữa hai vòng...). Kết quả tính toán cho thấy khi ñường kính ngoài tăng thì tần số cộng hưởng giảm theo quy luật hàm số mũ. Độ từthẩm hiệu dụng cũng ñược tính từ mô hình này cho thấy cấu trúc vòng nhôm hở có ñộ từ thẩm âm tại tần số cộng hưởng. Bên cạnh ñó, ảnh hưởng của bề dày lớp ñiện môi cũng ñược xác lập và bàn luận chi tiết.

P-80. Controlled Teleportaion via Trio Coherent States

Truong Minh Duc(1), Tran Quang Dat(1) and Nguyen Ba An(2)


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(1) Physics Department, Hue University of Pedagogy, 32 Le Loi, Hue

(2) Center for Theoretical Physics, Institute of Physics, 10 Dao Tan, Hanoi

We propose a protocol for controlled quantum teleportation of continuous variable states via trio coherents states. In our protocol, using quadrature phase operators and photon counting, a sender is able to teleport an arbitrary unknown coherent state to a distant receiver, without physically sending the state itself, but with the control of a third party, the supervisor. We present in detail two different ways of controlling the teleportation task and compare them with each other.

P-81. Higher-Order Nonclasical Properties of two-Mode Pho ton- Added Displaced Squeezed States

Truong Minh Duc(1), Nguyen Thi Xuan Hoai (1) and Nguyen Ba An(2)

(1) Physics Department, Hue University of Pedagogy, 32 Le Loi, Hue

(2) Center for Theoretical Physics, Institute of Physics, 10 Dao Tan, Hanoi

In this work, we consider higher-order squeezing and antibunching in two-mode photon-added displaced squeezed states. We obtain analytic expressions for the degree of the two-mode squeezing and antibunching to any order. We show that these states exhibit the so-called sum and difference squeezing. We also investigate the distinct properties of these two kinds of squeezing as well as the degree of antibunching as a function of the order.

P-82. Influence of Principle Parameters on the Average St iffness of Optical Tweezer using Pulsed Gaussian Beams

Ho Quang Quy, Hoang Dinh Hai, Doan Hoai Son, Chu Va n Lanh.

Univesity of Vinh

In this article expresions used to simulate the trap stiffness k of the optical trap are derived. The influence of principle parameters as total energy, beam waist and duration of pulsed laser beam, radius of dielectric particle, and viscosity of surrounding medium on the stiffness is simulated and discussed. Key words: Optical trap, Gaussian pulsed beam, Optical force, Brownian motion.

P-83. The FK Operator Method for Exact Numerical Solutions of Schrodinger Equation of Two-Dimensional Negative Ex citon

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Le Quy Giang, Nguyen Thi Man, Hoang Do Ngoc Tram , Le Van Hoang


By using the Laplace transformation, we show that the FK operator method can be applied successfully for solving the Schrödinger equation of a two-dimensional negative exciton to obtain exact numerical solutions. The optimum choice of the free parameter makes the algorithm to be very fast in comparison with other numerical methods. The algebraic form of the basis functions are built in a universal way that can be used not only in this work but also for further application to other two-dimensional atomic problems.

P-84. Bistability Characteristics of the Reflected signal through a Symetric Nonlinear Michelson Interferometer

Nguyen Van Hoa(1), Ho Quang Quy(2)

(1) Faculty of Technology, Hong Duc University, Emails: [email protected]

(2) Academy of Military Science Technology, Email: [email protected]

Abstract. General relationship between the intensity of the input signal and the intensity of the reflected signal through a Symmetric Nonlinear Michelson Interferometer (SNMI) were calculated and investigated. That we can confirm that SNMI operating as an optical bistable device if we select the appropriate structural parameters. References [1]. Demtroder W (1982), Laser Spectroscopy, New York. [2]. Sakata H. (2001), “Photonic analog-to digital conversion by use of nonlinear Fabry-Perot resonators”. Appl.Phys., 40, 240-248 [3]. N. V. Hoa, H. Q. Quy, Proc. of The GVS6, Chemnitz, May 25-31 (2003). [4]. H. Q. Quy, V. N. Sau, N. V. Hoa, Commun.in Phys. Vol 13, No.3 (2003) pp. 157-164. [5]. H. Q. Quy, N. V. Hoa, Proc. of The GVS7, HaLong, March 28-April 3 (2004). [6]. N. V. Hoa, H. Q. Quy, V. N. Sau, Commun.in Phys. Vol 15, No.1 (2005) pp 6-12.

P-85. The TDSE Method for Calculation of High- Order Harmonic Spectra of a One-Dimensional Atom with Soft-Coulomb Potential

Hoang Van Hung, Tran Trieu Phu, Le Van Hoang


Basing on the split-operator method, we have established an algorithm of solving the time-dependent Schrödinger equation for a


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soft-Coulomb atom interacting with ultra-short laser pulses. Using the obtained time-dependent exact numerical wavefunctions, we then calculate high-order harmonic spectra. This way of calculation is so-called the TDSE method. The results are correct in comparison with ones of other authors that make this algorithm credible and useful for further application.

P-86. Joint Remote Preparation of Four-Qubit Cluster- Type States Revisited

Nguyen Ba An(1) , Cao Thi Bich(1) and Nung Van Don( 2)

(1) Center for Theoretical Physics, Institute of Physics, Hanoi

(2) Physics Department, Hanoi National University, Hanoi

We revisit the protocols proposed recently [Y. B. Zhan et al., J. Phys. B 44, 095501 (2011)] for joint remote preparation of four-qubit cluster-type states. We not only point up the errors in those protocols but also make considerable improvements. Our protocols, for both the cases of real and complex coefficients of the state to be prepared, consume much less quantum resource as well as classical communication cost.

P-87. Molecular dynamic simulation of FeNi nano materials

Nguyen Viet Huy, Le Van Vinh and Pham Khac Hung

Department of Computational Physics, Hanoi University of Science and Technology

The atomic models of FeNi nanoparticles and thin films are constructed by molecular dynamic method using embedded-atom potential. The local structure is analyzed through the pair radial distribution function, coordination number, topology and simplex statistics. It was found that the structure of nanoparticle consists of two layers: core and surface shell, and the structure of the films consists of the surface layer and inside layer. Furthermore, the magnetic properties and glass transition temperature of nanoparticles and thin films are also calculated and discussed here.

P-88. Tracer-diffusion mechanism in amorphous iron

Nguyen Thi Thanh Ha, Nguyen Thi Hien and Pham Khac Hung

Department of Computational Physics, Hanoi University of Science and Technology, Hanoi

The paper presents the simulation of new diffusion mechanism

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assumed for tracer diffusion in the amorphous iron. This mechanism consists in that one of the atoms around the simplex moves by a long distance and the others by small distances. An atomic model of amorphous iron consisting of 20000 atoms was constructed by means of molecular dynamic and statistics relaxation method. The pair correlation distributed function is found to be in good agreement with experiment. The local structure of amorphous model is analyzed through the simplex statistics. It was found that only large simplex like microscopic bubble enables to realize such atomic movement. Furthermore, the number of bubble-simplexes strongly depends on the relaxation degree. The diffusion coefficient calculated for the suggested mechanism for amorphous iron is in good agreement with experiment. The effect of reduce of diffusion coefficient upon thermal annealing is interpreted by the loss of the bubble-simplexes.

P-89. Studying the Diffusion of Particles on Energeticall y Disordered Lattices Using Monte-Carlo Simulation and Analytica l Method

Trinh Van Mung, Nguyen Van Hong and Pham Khac Hung

Hanoi University of Technology

The diffusion in disordered systems (one and two dimensions) is studied by Monte-Carlo simulation and analytical methods which base on random barrier and random trap models. The properties of diffusion of single and many particles are investigated in detail. The characteristic parameters of diffusivity in disorderd lattice such as the correlation factor, the mean time between two subsequent jumps and the dependence of diffusion coefficient on particle concentration are calculated and analysed. The analytical data and numerical data obtained by Monte Carlo simulations are also compared with each other and discussed here.

P-90. Examine the Information Behavior of DNA near the me lting phase Transition Point

V. T. H. My, C. T. Anh, T. T. T. Van, N. V. Thanh, and N. A. Viet


Using the relationship between entropy and information, we examine the basics thermodynamic and information properties of DNA near its melting phase transition point. The investigation is based on the PB (Peyrard and Bishop) microscopic model of DNA. We show that the information behaviors of DNA agree with the statements of the second and fourth thermodynamic laws for information. Some open and relevant problems for information and biological systems are


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discussed.

P-91. Resistivity Beyond Linear Response in Layered Superconductors under Magnetic Field

Bui Duc Tinh(1), Dingping Li(2), and Baruch Rosenst ein(3)

(1) Faculty of Physics, Hanoi National University of Education, Hanoi, Vietnam

(2) Department of Physics, Peking University, Beijing 100871, China

(3) Department of Electrophysics, National Chiao Tung University, Hsinchu 30050, Taiwan, Republic of China

We use the time-dependent Ginzburg-Landau approach to investigate nonlinear response of a strongly type-II superconductor. The layered structure of the superconductor is accounted for by means of the Lawrence-Doniach model. Thermal fluctuations, represented by the Langevin white noise, are assumed to be strong enough to melt the Abrikosov vortex lattice created by the magnetic field into a moving vortex liquid. The nonlinear interaction term in dynamics is treated within self-consistent Gaussian approximation. The resistivity beyond linear response is calculated for arbitrary temperature, and electric field. Our results include all Landau levels. The application of strong electric fields results in a slightly stronger suppression of the superconducting fluctuations.

P-92. Nghi ệm ph ương trình truy ền nhi ệt Chaos v ới nguyên ph ụ thu ộc thời gian

Phan Hoàng Ch ương

Trường Đại học Công nghệ Thông tin, ĐHQG TP HCM

Chuyển ñộng lưỡng tính sóng hạt của hạt vi mô có thể xem như dạng chuyển ñộng Chaos, vì vậy phương trình Schrodinger với biến tọa ñộ ngẫu nhiên (tỉ lệ với biến Wiener) có thể ñưa về phương trình truyền nhiệt ngẫu nhiên với thế năng ñóng vai trò nguồn nhiệt. Sửdụng giải tích ngẫu nhiên tìm nghiệm phương trình truyền nhiệt ngẫu nhiên trường hợp 1 chiều với nguồn phụ thuộc thời gian.

P-93. First Rotational Spectroscopic Observation for the 21П State in NaLi

Nguyen Tien Dung(1), Pham Van Trong (1), Nguyen Van Thinh(2), Mai Van Dung(3), Dinh Xuan Khoa(1), Vu Ng oc Sau (1),

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and Nguyen Huy Bang(1)

(1) Vinh University, 182 Le Duan Str., Vinh City, Vietnam

(2) Bac Lieu University, 108 Vo Thi Sau Str., Bac Lieu City, Bac Lieu Province

(3) University of Thu Dau 1, 06 Tran Van On Str., Binh Duong Province

The alkali-metal diatomic molecules have been attractive for both theoreticians and experimentalists because they have a relatively simple electronic structure. Their electronic structure is frequently considered by theoreticians as a very convenient model for introducing approximations which can be further applied to more complex molecular systems. From the experimental point of view, alkali-metal diatomic molecules with their main absorption bands lying in the visible and UV regions are very convenient objects for investigations with modern laser spectroscopy techniques. Investigations of alkali-metal molecules have recently experienced additional impetus since the formation of molecular Bose-Einstein condensates [1]. As in several experimental techniques related to cold molecules involve optical excitation either in the formation or detection stages, an accurate need of precise spectroscopic characterization of excited molecular states has arisen. Among alkali-metal diatomic molecules, NaLi is particularly interested there because it has permanent dipole moment, thus can therefore be manipulated with external electric fields. Experimental investigations for the NaLi molecule, however, encounter two dilemmatic problems. The first one is the spectral overlaps due to a large number of allowed electric dipole transitions between various rovibrational energy levels. The second one is the difficulty in producing NaLi molecules is gas phase due to a big difference in melting-point temperatures between Na and Li bulks. Up to date, number of studied electronic states is quite limited [3-8]. As was suggested by the Schawlow’s group, the problem for spectroscopic overlaps could be surmounted by using the so called polarization labelling spectroscopy (PLS) technique [2]. Although the polarization spectra are Doppler limited but they are greatly simplified due to labelling process. In this work, we present our PLS observation for NaLi. Over 800 spectral lines, which local up to near dissociation limit, have been identified. To our knowledge, this is the first time the rotational structure of NaLi in the 21 state has been resolved.


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DANH SÁCH ĐĂNG KÝ ĐẠI BIỂU

TT Họ và tên Email C ơ quan

1 Đào Khắc An [email protected] VKHVL

2 Nguyễn Bá Ân [email protected] VVL, HN

3 Chu Thùy Anh [email protected] VVL, HN

4 Lê Đức Ánh [email protected] ĐHSP HN

5 Nguyễn Tuấn Anh [email protected] ĐHCNTP Tp. HCM

6 Nguyễn Tuấn Anh [email protected] ĐHĐL HN

7 Andrey Arbuzov [email protected] BLTP, Dubna

8 Nguyễn Huy Bằng [email protected] ĐH Vinh

9 Nguyễn Thái Bang [email protected] THTP Anh Sơn 3

10 Nguyễn Quang Báu [email protected] ĐHKHTN HN

11 Cao Thị Bích [email protected] VVL, HN

12 Chu Văn Biên [email protected] ĐHHĐ Thanh Hóa

13 Nguyễn Thị Bính ĐHSP HN 2

14 Nguyễn Dương Bộ [email protected] VVL, HN

15 Võ Hữu Cầu [email protected] ĐHSP Huế

16 Chia-Chu Chen [email protected] National Cheng-Kung Univ.

17 Nguyễn Văn Chinh [email protected] ĐHKHTN HN

18 Phan Hoàng Chương [email protected] ĐHCNTT, ĐHQG TP HCM

19 Bạch Thành Công [email protected] ĐHKHTN HN

20 Nguyễn Chính Cương [email protected] ĐHSP HN

21 Nguyễn Như Đạt [email protected] VVL, HN

22 Nguyễn Đắc Diện [email protected] ĐHBK HN

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23 Đặng Hữu Định [email protected] CĐCN Tuy Hòa

24 Lê Đình [email protected] ĐH Huế

25 Lê Văn Đoài [email protected] ĐH Vinh

26 Nùng Văn Đơn [email protected] VVL, HN

27 Phùng Văn Đồng [email protected] VVL, HN

28 Đào Vọng Đức [email protected] VVL, HN

29 Đinh Lưu Minh Đức [email protected] THPT Châu Thành 2

30 Trương Minh Đức [email protected] ĐHSP Huế

31 Đặng Thị Dung [email protected] VVL, HN

32 Đoàn Trí Dũng [email protected] VVL, HCM

33 Nguyễn Tiến Dũng [email protected] ĐH Vinh

34 Trần Nguyễn Dũng [email protected] VVL, HN

35 Nguyễn Văn Duy [email protected] ĐHBK HN

36 Nguyễn Xuân Giao [email protected] TC Comm. in Phys.

37 Nguyễn Hồng Hà VVL, HN

38 Nguyễn Thị Thanh Hà [email protected] ĐHBK HN

39 Phạm Thị Thu Hà [email protected] ĐHKHTN HN

40 Tô Bá Hạ [email protected] HVKT QS

41 Đặng Thị Phương Hải ĐHSP HN 2

42 Đỗ Thị Hồng Hải [email protected] ĐH Mỏ Địa Chất

43 Kim Ngọc Hải [email protected] TTQT&PTTNMT HN

44 Lê Thanh Hải [email protected] ĐHXD HN

45 Phan Thanh Hải [email protected] IPTC

46 Phạm Thị Kim Hằng [email protected] VVL, HN

47 Bùi Thị Hạnh [email protected] VVL, HN


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48 Bùi Văn Hào [email protected] ĐH Quy Nhơn

49 Nguyễn Đức Hảo [email protected] ĐH TD Một

50 Trần Viết Nhân Hào [email protected] Đh Tân Tạo

51 Lê Thị Diệu Hiền [email protected] ĐHSP Huế

52 Nguyễn Đức Hiền [email protected] ĐH Tây Nguyên

53 Nguyễn Thị Thu Hiền [email protected] ĐHSP HN

54 Trần Minh Hiến [email protected] VVL, HCM

55 Hồ Khắc Hiếu [email protected] ĐHXD HN

56 Nguyễn Văn Hiếu [email protected] ĐH Đà Nẵng

57 Nguyễn Văn Hinh [email protected] ĐHCN HN

58 Lê Viết Hòa [email protected] ĐHSP HN

59 Nguyễn Văn Hoa [email protected] ĐHSP Tp. HCM

60 Nguyễn Văn Hoá [email protected] ĐHHĐ Thanh Hóa

61 Trần Thái Hoa [email protected] ĐHSP HN 2

62 Nguyễn Lâm Hoài [email protected] VVL, HN

63 Nguyễn Thị Xuân Hoài [email protected] ĐHSP Huế

64 Nguyễn Quốc Hoàn [email protected] Sở GD&DT HG

65 Lê Văn Hoàng [email protected] ĐHSP Tp. HCM

66 Trịnh Xuân Hoàng [email protected] VVL, HN

67 Nguyễn Quang Học [email protected] ĐHSP HN

68 Bùi Đình Hợi [email protected] ĐHXD HN

69 Đào Thị Hồng [email protected] VVL, HN

70 Nguyễn Văn Hồng [email protected] ĐHBK HN

71 Phan Thị Thanh Hồng [email protected] ĐHSP HN 2

72 Nguyễn Văn Hợp [email protected] ĐHSP HN

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73 Lê Thọ Huệ [email protected] VVL, HN

74 Đỗ Mạnh Hùng [email protected]

75 Hà Thanh Hùng [email protected] ĐHSP HN 2

76 Hoàng Văn Hưng [email protected] ĐHSP Tp. HCM

77 Nguyễn Bá Hưng [email protected] VVL, HN

78 Nguyễn Ngọc Hưng ĐHSP Tp. HCM

79 Nguyễn Quang Hưng [email protected] Đh Tân Tạo

80 Phạm Khắc Hùng [email protected] ĐHBK HN

81 Phan Ngọc Hưng [email protected] ĐHSP Tp. HCM

82 Vũ Văn Hùng [email protected] ĐHSP HN

83 Đặng Thị Hương [email protected] VVL, HN

84 Đỗ Thị Hương [email protected] VVL, HN

85 Lê Thị Thanh Hương [email protected] ĐH Hải Phòng

86 Nguyễn Quê Hương [email protected] Marshall Univ.

87 Nguyễn Thị Thu Hường [email protected] ĐHKHTN HN

88 Nguyễn Thu Hương [email protected] HVPK - KQ

89 Hồ Xuân Huy [email protected] ĐH An Giang

90 Mai Thánh Huyền [email protected] ĐHKHTN HCM

91 Nguyễn Quốc Khánh [email protected] ĐHKHTN HN

92 Đinh Xuân Khoa [email protected] ĐH Vinh

93 Trang Huỳnh Đăng Khoa [email protected] ĐHCNTP Tp. HCM

94 Dương Thị Lan [email protected] ĐHSP HN

95 Nguyễn Trí Lân [email protected] VVL, HN

96 Trần Nguyên Lân [email protected] VVL, HCM

97 Chu Văn Lanh [email protected] ĐH Vinh


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98 Đỗ Hồng Liên [email protected] CĐSP Hà Nam

99 Đỗ Phương Liên [email protected] ĐHBK HN

100 Lê Thị Hồng Liên [email protected] ĐHBK HN

101 Phan Hồng Liên [email protected] HVKT QS

102 Nguyễn Thị Hà Loan [email protected] ĐHSP HN 2

103 Hoàng Ngọc Long [email protected] VVL, HN

104 Nguyễn Văn Long [email protected] CĐSP Gia Lai

105 Đắc Hoàng Luật [email protected] ĐHKHTN HCM

106 Mai Văn Lưu [email protected] ĐH Vinh

107 Lê Thị Luyện [email protected] ĐHKHTN HN

108 Trần Yến Mi [email protected] ĐH CT

109 Vy Thị Hà My [email protected] VVL, HN

110 Nguyễn Đình Nam [email protected] ĐHKHTN HN

111 Valentin Nesterenko [email protected] BLTP, Dubna

112 Nguyễn Thanh Nga [email protected] ĐHKHTN HN

113 Phạm Thị Thanh Nga [email protected] ĐH Thủy Lợi

114 Nguyễn Văn Nghĩa [email protected] ĐH Thủy Lợi

115 Tăng Hồng Ngữ [email protected] Sun Yat-Sen Univ.

116 Lê Công Nhận [email protected] ĐH SG

117 Nguyễn Thị Thanh Nhàn [email protected] ĐHKHTN HN

118 Nguyễn Thu Nhàn [email protected] ĐHBK HN

119 Nguyễn Vũ Nhân [email protected] HVPK - KQ

120 Lý Duy Nhất [email protected] ĐHSP Tp. HCM

121 Nguyễn Thị Thùy Nhung [email protected] VVL, HN

122 Võ Văn Ớn [email protected] ĐH TD Một

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123 Mai Hoàng Linh Phi [email protected] VVL, HCM

124 Nguyễn Thanh Phong [email protected] ĐH CT

125 Trần Công Phong [email protected] CĐ GDVN

126 Huỳnh Vĩnh Phúc [email protected] ĐHĐT

127 Dương Đại Phương [email protected] Đoàn 871 TCCT, BQP

128 Kim Thị Phương [email protected] PTTH Ngọc Hồi

129 Lê Thị Thu Phương [email protected] ĐH Huế

130 Lê Thị Trúc Phương [email protected] VVL, HCM

131 Nguyễn Thị Minh Phương

[email protected] ĐH Quy Nhơn

132 Nguyễn Hồng Quang [email protected] VVL, HN

133 Hồ Quang Quý [email protected] VKH & CNQS

134 Nguyễn Thị Quyên [email protected] ĐHKHTN HN

135 Lê Khắc Quynh [email protected] ĐHSP HN 2

136 Vũ Ngọc Sáu [email protected] ĐH Vinh

137 Nedelko Sergey [email protected] BLTP, Dubna

138 Vetpany Sivongxay [email protected] Vientiane ,Laos

139 Đặng Văn Soa [email protected] ĐHSP HN

140 Đoàn Hoài Sơn [email protected] ĐH Vinh

141 Nguyễn Hồng Sơn [email protected] ĐH CĐ

142 Nguyễn Thị Thanh Tâm [email protected] ĐH Quảng Nam

143 Phạm Đình Tám [email protected] HVKT QS

144 Phạm Duy Tân Trường SQ Tăng Thiết Giáp

145 Vũ Kim Thái [email protected] ĐHKTKTCN

146 Nguyễn Toàn Thắng [email protected] VVL, HN

147 Lưu Thị Kim Thanh [email protected] ĐHSP HN 2


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148 Ngô Văn Thanh [email protected] VVL, HN

149 Nguyễn Văn Thành [email protected] ĐHKHTN HN

150 Thái Doãn Thanh [email protected] ĐHCNTP Tp. HCM

151 Đinh Như Thảo [email protected] ĐH Huế

152 Nguyễn Huy Thảo [email protected] ĐHSP HN 2

153 Phạm Hương Thảo [email protected] ĐHSP Huế

154 Tô Thị Thảo [email protected] VVL, HN

155 Nguyễn Phước Thể [email protected] ĐH Duy Tân

156 Cao Huy Thiện [email protected] VVL, HCM

157 Nguyễn Văn Thịnh [email protected] ĐH Bạc Liêu

158 Nguyễn Viễn Thọ [email protected] ĐHBK HN

159 Nguyễn Văn Thụ [email protected] ĐHSP HN 2

160 Nguyễn Thị Thương [email protected] VVL, HN

161 Bùi Nguyễn Ngọc Thúy [email protected]

162 Bùi Phương Thúy [email protected] VVL, HN

163 Đoàn Minh Thủy [email protected] ĐH Quy Nhơn

164 Nguyễn Thị Thúy [email protected] VVL, HN

165 Hoàng Văn Tích [email protected] ĐHSP HN

166 Nguyễn Thành Tiên [email protected] ĐH CT

167 Tống Sỹ Tiến [email protected] ĐHKHTN HN

168 Trần Minh Tiến [email protected] VVL, HN

169 Bùi Đức Tĩnh [email protected] ĐHSP HN

170 Nguyễn Thế Toàn [email protected] Georgia Ins. of Tech.

171 Hoàng Đỗ Ngọc Trầm [email protected] ĐHSP Tp. HCM

172 Đỗ Thu Trang [email protected] ĐHKHTN HN

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173 Vũ Thị Thu Trang [email protected] ĐHKHTN HN

174 Phạm Văn Trọng [email protected] ĐH Vinh

175 Huỳnh Nguyễn Thanh Trúc

[email protected] THPT Lương Thế Vinh

176 Nguyễn Bảo Trung [email protected] ĐHKHTN HN

177 Võ Kiên Trung [email protected] ĐHKHTN HCM

178 Phan Minh Trường [email protected] VVL, HCM

179 Thi Trần Anh Tú [email protected] VVL, HCM

180 Hoàng Anh Tuấn [email protected] VVL, HN

181 Nguyễn Anh Tuấn [email protected] ĐHBK HN

182 Nguyễn Anh Tuấn [email protected] ĐHKHTN HN

183 Lương Văn Tùng [email protected] ĐHĐT

184 Nikolay Tyurin [email protected] BLTP, Dubna

185 Võ Văn Viên [email protected] ĐH Tây Nguyên

186 Lê Hồng Việt ĐHSP HN 2

187 Mai Văn Dũng [email protected] ĐH TD Một

188 Nguyễn Ái Việt [email protected] VVL, HN

189 Nguyễn Huy Việt [email protected] VVL, HN

190 Đinh Quang Vinh [email protected] ĐHSP HN

191 Lê Văn Vinh [email protected] ĐHBK HN

192 Đinh Quốc Vương [email protected] Sở GD QN

193 Xue Xun [email protected] East China Normal Univ.


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DANH SÁCH TÊN VIẾT TẮT

Tên CQ Viết tắt Tên CQ ñầy ñủ

BLTP, Dubna Joint Institute for Nuclear Research

CĐ GDVN Công ñoàn giáo dục Việt Nam

CĐCN Tuy Hòa Trường Cao Đẳng Công Nghiệp Tuy Hòa

CĐSP Gia Lai Trường Cao ñẳng Sư phạm Gia Lai

CĐSP Hà Nam Trường cao ñẳng sư phạm Hà Nam

ĐH An Giang Trường Đại học An Giang

ĐH Bạc Liêu Trường Đại học Bạc Liêu

ĐH CĐ Trường Đại học Công Đoàn

ĐH CT Trường Đại học Cần Thơ

ĐH Đà Nẵng Trường Đại học Đà Nẵng

ĐH Duy Tân Trường Đại học Duy Tân

ĐH Hải Phòng Trường Đại học Hải Phòng

ĐH Huế Trường Đại học Huế

ĐH Mỏ Địa Chất Trường Đại học Mỏ - Địa chất

ĐH Quảng Nam Trường Đại học Quảng Nam

ĐH Quy Nhơn Trường Đại học Quy Nhơn

ĐH SG Trường Đại học Sài Gòn

Đh Tân Tạo Trường Đại học Tân Tạo

ĐH Tây Nguyên Trường Đại học Tây Nguyên

ĐH TD Một Trường Đại học Thủ Dầu Một

ĐH Thủy Lợi Trường Đại học Thủy Lợi

ĐH Vinh Trường Đại học Vinh

ĐHBK HN Trường Đại học Bách Khoa Hà Nội

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ĐHCN HN Trường Đại học Công Nghiệp Hà Nội

ĐHCNTP Tp. HCM Trường Đại học Công nghiệp Thực phẩm Tp. Hồ Chí Minh

ĐHCNTT, ĐHQG TP HCM Trường Đại học Công nghệ Thông tin, ĐHQG TP HCM

ĐHĐL HN Trường Đại học Điện lực Hà Nội

ĐHĐT Trường Đại học Đồng Tháp

ĐHHĐ Thanh Hóa Trường Đại học Hồng Đức Thanh Hóa

ĐHKHTN HCM Trường Đại học Khoa học tự nhiên Tp. HCM

ĐHKHTN HN Trường Đại học Khoa học tự nhiên Hà Nội

ĐHKTKTCN Trường Đại học Kinh tế kỹ thuật công nghiệp

ĐHSP HN Trường Đại học Sư phạm Hà Nội

ĐHSP HN 2 Trường Đại học Sư phạm Hà Nội 2

ĐHSP Huế Trường Đại học Sư phạm Huế

ĐHSP Tp. HCM Trường Đại học Sư phạm Tp. HCM

ĐHXD HN Trường Đại học Xây dựng Hà Nội

Đoàn 871 TCCT, BQP Đoàn 871 Tổng cục Chính trị, Bộ Quốc Phòng

East China Normal Univ. Department of Physics, East China Normal University

Georgia Ins. of Tech. Georgia Institute of Technology

HVKT QS Học viện Kỹ thuật Quân sự

HVPK - KQ Học viện Phòng không - Không quân

IPTC Institute of Physical and Theoretical Chemistry

Marshall Univ. Marshall University

National Cheng-Kung Univ. National Cheng-Kung University, Physics Department

PTTH Ngọc Hồi Trường PTTH Ngọc Hồi

Sở GD QN Sở Giáo dục tỉnh Quảng Ninh

Sở GD&DT HG Sở Giáo dục và Đào tạo Hà Giang


88

Sun Yat-Sen Univ. Sun Yat-sen university

TC Comm. in Phys. Tạp chí Communications in Physics

THPT Châu Thành 2 Trường THPT Châu Thành 2

THPT Lương Thế Vinh Trường THPT Lương Thế Vinh

THTP Anh Sơn 3 Trường THTP Anh Sơn 3

Trường SQ Tăng Thiết Giáp Trường sĩ quan tăng thiết giáp

TTQT&PTTNMT HN Trung tâm quan trắc & phân tích tài nguyên môi trường Hà Nội

VCNTT, VNU Viện Công Nghệ thông tin, VNU

Vientiane ,Laos Vientiane ,Laos

VKH & CNQS Viện Khoa học và Công nghệ Quân sự

VKHVL Viện Khoa học Vật liệu

VVL, HN Viện Vật lý, Hà Nội

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Chỉ dẫn tác gi ả Arbuzov Andrey .................14, 24, 76

Bach Thanh Cong........12, 15, 28, 60

Bui Dinh Hoi...............................9, 46

Bui Duc Tinh ............................18, 73

Bui Nguyen Ngoc Thuy......10, 51, 82

Bui Phuong Thuy .....................11, 54

Bui Thi Hanh..............................8, 40

Bui Van Hao.............................10, 51

Cao Ho Thanh Xuan ................10, 51

Cao Thi Bich ............................18, 72

Chia-Chu Chen ..............6, 13, 31, 76

Chu Thuy Anh..............11, 18, 55, 73

Chu Van Bien...........................10, 49

Chu Van Lanh..........................17, 70

Dang Huu Dinh ..................10, 49, 76

Dang Thi Dung.........................14, 58

Dang Thi Phuong Hai...............10, 48

Dang Van Soa ...............................57

Dao Duc Khang .......................21, 36

Dao Khac An............................21, 36

Dao Vong Duc ...............7, 14, 32, 37

Dinh Nhu Thao.............12, 16, 29, 64

Dinh Quoc Vuong ..........8, 15, 41, 62

Dinh Xuan Khoa.......................18, 74

Do Hong Lien...........................12, 29

Do Manh Hung...........................8, 42

Do Phuong Lien .......................17, 68

Do Thi Hong Hai ........................7, 38

Do Thi Huong...11, 19, 21, 27, 34, 56

Do Van Nam ..............................9, 45

Doan Hoai Son ........................17, 70

Doan Minh Thuy ..........10, 17, 51, 67

Doan Tri Dung .........................12, 30

Duong Dai Phuong ....................9, 47

Duong Thi Lan .........................16, 63

Ha Thanh Hung....................... 12, 56

Ho Khac Hieu............................ 9, 47

Ho Quang Quy .11, 17, 18, 53, 70, 71

Ho Trung Dung ............13, 17, 32, 68

Hoang Anh Tuan..........16, 63, 64, 65

Hoang Dinh Hai....................... 17, 70

Hoang Do Ngoc Tram ..17, 19, 33, 70

Hoang Ngoc Long ...8, 12, 19, 34, 39, 56

Hoang Van Hung..........10, 18, 49, 71

Hoang Van Tich ...................... 16, 65

Huynh Nguyen Thanh Truc10, 50, 82

Huynh Vinh Phuc ................ 8, 40, 42

Kim Thi Phuong ........................ 8, 41

Le Cong Nhan......................... 11, 51

Le Duc Anh ..................16, 63, 64, 65

Le Hong Viet ........................... 10, 48

Le Khac Quynh ......................... 8, 39

Le Thanh Hai .......................... 13, 31

Le Thi Hong Lien....................... 9, 45

Le Thi Luyen ........................... 15, 62

Le Thi Thu Phuong.........9, 15, 43, 62

Le Thi Truc Phuong................. 17, 68

Le Tho Hue ............................. 12, 56

Le Van Hoang ...2, 10, 11, 13, 17, 18, 19, 33, 49, 50, 51, 52, 70, 71, 78

Le Van Vinh ............................ 18, 72

Le Viet Hoa ............................. 19, 33

Luong Van Tung 8, 16, 20, 35, 41, 65

Luu Thi Kim Thanh...........7, 9, 38, 47

Ly Duy Nhat ...................... 10, 50, 80

Mai Hoang Linh Phi................. 15, 59

Mai Thanh Huyen.................... 15, 61

Mai Van Dung ......................... 18, 74

Mai Van Luu............................ 11, 53


90

Nedelko Sergei N.....................19, 25

Nesterenko Valentin O.............13, 24

Ngo Van Thanh..7, 11, 18, 28, 55, 73

Nguyen Ai Viet ..7, 11, 12, 18, 28, 29, 55, 56, 73

Nguyen Anh Tuan.13, 15, 17, 30, 59, 68

Nguyen Ba An........17, 18, 69, 70, 72

Nguyen Ba Hung .....................11, 54

Nguyen Bao Trung...................17, 67

Nguyen Chinh Cuong...............19, 33

Nguyen Dinh Nam ...................15, 62

Nguyen Duc Hien.....................16, 65

Nguyen Duong Bo .....................9, 44

Nguyen Hong Quang .................9, 44

Nguyen Hong Son ...................10, 48

Nguyen Huy Bang....................18, 74

Nguyen Huy Thao..........................57

Nguyen Huy Vite........................6, 27

Nguyen Lam Hoai ....................11, 56

Nguyen Nhu Dat ..........13, 15, 31, 60

Nguyen Phuoc The ....................7, 28

Nguyen Quang Bau ..8, 9, 15, 16, 21, 36, 41, 46, 62, 63

Nguyen Quang Hoc .....10, 16, 48, 65

Nguyen Quang Hung ...14, 19, 33, 58

Nguyen Que Huong .................20, 26

Nguyen Quoc Khanh................15, 61

Nguyen Thai Bang ...................11, 53

Nguyen Thanh Nga..................14, 57

Nguyen Thanh Phong..............21, 37

Nguyen Thanh Tien .....12, 16, 29, 64

Nguyen The Toan ......................7, 23

Nguyen Thi Binh ......................10, 48

Nguyen Thi Ha Loan..................8, 39

Nguyen Thi Huyen Trang.........10, 50

Nguyen Thi Minh Phuong ........10, 51

Nguyen Thi Quyen .................. 15, 62

Nguyen Thi Thanh Ha............. 18, 72

Nguyen Thi Thanh Nhan...15, 16, 62, 63

Nguyen Thi Thu Hien .............. 16, 63

Nguyen Thi Thuong..........8, 9, 40, 45

Nguyen Thi Thuy..................... 19, 34

Nguyen Thi Xuan Hoai ............ 17, 70

Nguyen Thu Huong................... 9, 46

Nguyen Thu Nhan............. 11, 53, 54

Nguyen Tien Dung .................. 18, 74

Nguyen Toan Thang ............... 15, 60

Nguyen Tri Lan ....................... 15, 59

Nguyen Tuan Anh .11, 17, 19, 33, 53, 68

Nguyen Van Chinh.................. 12, 28

Nguyen Van Duy................. 9, 45, 77

Nguyen Van Hieu.................... 21, 36

Nguyen Van Hoa...10, 18, 50, 51, 71, 78

Nguyen Van Hong................... 18, 73

Nguyen Van Hop..................... 17, 67

Nguyen Van Long ...6, 19, 20, 33, 34, 80

Nguyen Van Nghia.................... 8, 41

Nguyen Van Thanh ................. 13, 30

Nguyen Van Thinh .................. 18, 74

Nguyen Van Thu ..................... 20, 34

Nguyen Vien Tho ...................... 7, 38

Nguyen Vu Nhan..................... 15, 62

Nung Van Don ........................ 18, 72

Pham Dinh Tam ...................... 10, 48

Pham Duy Tan ........................ 10, 48

Pham Huong Thao.................. 15, 60

Pham Khac Hung..11, 18, 53, 54, 72, 73

Pham Thi Thanh Nga.............. 15, 60

Pham Thi Thu Ha.................... 14, 57

TP. Quy Nh ơn 1-4/8/2011

91

Pham Van Trong......................18, 74

Phan Hoang Chuong .........18, 74, 76

Phan Hong Lien ...................7, 37, 38

Phan Minh Truong ...................17, 68

Phan Ngoc Hung .....................11, 52

Phan Thanh Hai.......................17, 67

Phan Thi Kim Hang....................9, 46

Phan Thi Thanh Hong..............16, 66

Phung Van Dong .......................8, 39

Thai Doan Thanh .....................11, 53

Thi Tran Anh Tu.......................14, 58

To Ba Ha....................................7, 38

Tong Sy Tien .................9, 16, 47, 66

Tran Cong Phong8, 9, 20, 35, 40, 42, 43

Tran Minh Tien.........................12, 24

Tran Nguyen Dung.................... 9, 44

Tran Nguyen Lan ...................... 7, 28

Tran Thai Hoa ........................... 7, 38

Trang Huynh Dang Khoa ........ 11, 53

Trinh Xuan Hoang............. 11, 54, 55

Truong Minh Duc............... 17, 69, 70

Tyurin Nikolai A............................. 25

Vetpany Sivongxay ........... 15, 60, 81

Vo Van On ................................ 7, 38

Vo Van Vien .............................. 8, 39

Vu Kim Thai ...................... 16, 64, 65

Vu Ngoc Sau........................... 18, 74

Vu Thi Thu Trang ...................... 8, 39

Vu Van Hung........6, 9, 16, 23, 47, 66

Vy Thi Ha My .......................... 18, 73

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