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Observations favor the crossing of phantom divide lines

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Science China(physics,Mechanics & Astronomy) 2010年第3期53卷 562-566页

作者： HUANG TieTie1,2.3. WU PuXun2.3.& YU HongWei2.3.1{3. of physics, Xiangnan College, Chenzhou 42.000, China 2.0} of physics and Institute of physics, hunan normal University, changsha 410081, China 3.ey Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education, hunan normal University, changsha 410081, China Xiangnan College Department of Physics Chenzhou China hunan normal University Department of Physics and Institute of Physics Changsha China (GRID:grid.411427.5) (ISNI:***) hunan normal University Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education Changsha China (GRID:grid.411427.5) (ISNI:***) hunan normal University Department of Physics and Institute of Physics Changsha China (GRID:grid.411427.5) (ISNI:***) hunan normal University Key Laboratory of Low Dimensional Quantum Structures and Quantum Control of Ministry of Education Changsha China (GRID:grid.411427.5) (ISNI:***)

Using three different parameterized dark energy models, we reconstruct the properties of dark energy from the latest 3.7 Sne Ia, CMB and BAO with the present matter density, Ωm0, given prior. We find that, when Ωm0 is not small, for example, Ωm0 = 0.2. or 0.3.0} an evolving dark energy with a crossing of phantom divide line is favored and this conclusion seems to be model independent. We also find that the evolving properties of dark energy become more and more evident with the increase of Ωm0 given prior.

关键词： cosmology auelerating expansion dark energy

Absorption Cross Section of Einstein-Maxwell Dilation Axion Black Hole for Dirac Particles

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Communications in Theoretical physics 2007年第12期48卷 1051-1054页

作者： LIU Chang-Qing JING Ji-Liang Institute of physics and department of physics,{3. normal University,changsha 410081,China Institute of physics and department of physics Hunan Normal University

The absorption cross section of the Einstein-Maxwell Dilaton Axion (EMDA) black hole for Dirac particlesis *** is shown that the absorption cross section decreases as both the v and the absolute value of the dilatonincrease,but it increases as the mass of the particle *** is also shown that the absorption cross section for themassless Dirac particles is 1/8 of the area of the horizon,which may be an universal property for minimally coupledmassless Dirac particles.

关键词： black hole absorption cross section Dirac particle

SUPERCONVERGENCE ANALYSIS FOR CUBIC TRIANGULARELEMENT OF THE FINITE ELEMENTSUPERCONVERGENCE ANALYSIS FOR CUBIC TRIANGULARELEMENT OF THE FINITE ELEMENT

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Journal of Computational Mathematics 2000年第5期18卷 541-550页

作者： Qi-ding Zhu (department of Mathematics, hunan {2. University,{3., China ) 湖南师范大学湖南长沙 410081

In this paper, we construct a projection interpolation for cubic triangular element by using othogonal expansion triangular method. We show two fundamental formulas of estimation on a special partion and obtain a superconvergence result of 1- ∈order higher for the placement function and its tangential derivative on the third order Lobatto points and Gauss points on each edge of triangular element.

关键词： Finite element Superconvergence Projection interpolation.

Bell States and Two-Qubit Logic Gate with Superconducting Charge Qubits Coupling to a Nanomechanical Resonator

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Communications in Theoretical physics 2007年第12期48卷 999-1002页

作者： LIAO Jie-Qiao~1 and WANG Xin-Wen~(2.3.~1 department of physics,{2. normal University,changsha 410081,China~2.department of physics,Beijing normal University,Beijing 100875,China~3.department of Electronic Engineering and physics,{2. University of Science and Engineering,Yongzhou 42.100,China department of physics Hunan Normal University department of physics Beijing Normal University department of Electronic Engineering and physics Hunan University of Science and Engineering

We propose a scheme for generating Bell states involving two SQUID-based charge qubits by coupling themto a nanomechanical *** also show that it is possible to implement a two-qubit logic gate between the twocharge qu... 详细信息

关键词： Bell states superconducting charge qubit two-qubit logic gate nanomechanical resonator

EQCM study on poly(aminothiophenol) monolayer

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Chinese Chemical Letters 1997年第6期8卷 533-534页

作者： Qing Ji XIE Ming MA (department of Chemistry, hunan {2. University,{3.) department of Chemistry Hunan Normal University Changsha 410081 China

In this letter, we report EQCM studies on the electrochemistry of poly(aminothiophenol) monolayer on Au in aqueous solutions. Results show that the monolayer polymer investigated exhibits only a one-step proton-involv... 详细信息

关键词： EQCM study on poly aminothiophenol monolayer

Boundedness in Lebesgue spaces for commutators of multilinear singular integrals and RBMO functions with non-doubling measures

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Science China Mathematics 2007年第3期50卷 361-376页

作者： Jing-shi XU department of Mathematics, hunan {2. University,{3., China department of Mathematics Hunan Normal University Changsha China

The boundedness in Lebesgue spaces for commutators generated by multilinear singular integrals and RMBO(μ) functions of Tolsa with non-doubling measures is obtained, provided that ∥μ∥ = ∞ and multilinear singular... 详细信息

关键词： multilinear singular integral commutator maximal function non-doubling measure RMBO(μ) function Primary 42.2. Secondary 42.2.

Nonlinear elastic waves in a monatomic chain with nonlinear interaction

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原子与分子物理学报 2002年第1期19卷 79-82页

作者： PAN Liu-xian 1, ZHOU Guang-hui 2. LI Shu-shen 3.1.department of physics, Yiyang Teacher's College, Yiyang 413.49 {2., hunan normal University, changsha 410081 3. National Laboratory for Supperlattice and Microstructure, Chinese department of physics Yiyang Teacher's College Yiyang 413049 department of physics Hunan Normal University Changsha 410081 中科院半导体所 National Laboratory for Supperlattice and Microstructure 北京 100083

Nonlinear wave equation for a one-dimensional anharmonic crystal lattice in terms of its microscopic parameters is obtained by means of a continuum approximation. Using a small time scale transformation, the nonlinear wave equation is reduced to a combined KdV equation and its single soliton solution yields the supersonic kink form of nonlinear elastic waves for the system.

关键词： Monatomic chain Continuum approximation Nonlinear elastic wave

Size distributions and magic number characteristics of cluster configurations formed during solidification processes of liquid metal Al

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Science China(Technological Sciences) 2006年第2期49卷 172-187页

作者： LIU Rangsu1, LIU Fengxiang1, DONG Kejun1, ZHENG Caixing1, LIU Hairong2. PENG Ping2.& LI Jiyong3.1. department of {3., {2. University, changsha 410082. China 2. department of Material Science and Engineering, {2. University, changsha 410082. China 3. department of Chemistry, {2. University, changsha 410082. China department of physics Hunan University

A molecular dynamics simulation study has been performed for a large systemconsisting of 100000 liquid metal Al atoms to investigate the formation and magic numbercharacteristics of the cluster configurations formed during the rapid solidification processes. Thecluster-type index method (CTIM) has been adopted to describe various types of clusterconfigurations. The results indicate that the icosahedral clusters (12.0 12.0) and theircombinations play the most important role in the rnicrostructure transitions during solidificationprocesses; for the cluster configurations of different levels formed by various combinations withdiffering numbers of basic clusters, their size distributions possess obvious magic number sequencewhich is in turn as 13.13., 19(2.), 2.-2.(2.), 3.0}3.(3.0}, 3.-40, 43.44, 48..., (those in bracket arethe corresponding value in liquid state); the magic numbers correspond to the peak value positionsof the cluster numbers for corresponding level formed with various combinations by 1, 2. 3. 4, 5, 6,7, ...basic clusters, respectively. This magic number sequence is in good agreement with theexperimental results obtained by Harris et al. At the same time, this simulation study also gives ascientific and reasonable explanation to these experimental results.

关键词： liquid metal, solidification processes, cluster configuration, magic numbers, computer simulation.

Stationary Classical Chaos of Trapped Two-Component Bose-Einstein Condensates in 1-D Optical Lattice Potentials

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Communications in Theoretical physics 2007年第7期48卷 125-131页

作者： FANG Jian-Shu LIU Wing-Ki ZHU Shan-Hua1 Institute of physics,hunan University of Technology,Zhuzhou 412.08,China2.{2. of physics,hunan normal University,changsha 410081,China3.{2. of physics,University of Waterloo,Waterloo,Ontario,Canada N2. 3.1 Institute of physics Hunan University of Technology Zhuzhou 412008 China

We study the nonlinear dynamics of two-component Bose-Einstein condensates in one-dimensional pe-riodic optical lattice *** stationary state perturbation solutions of the coupled two-component nonlinearSchr?dinger/Gross-Pitaevskii equations are constructed by using the direct perturbation *** analysisrevels that the perturbation solution is the chaotic one,which indicates the existence of chaos and chaotic region inparameter *** corresponding numerical calculation results agree well with the analytical *** applying thechaotic perturbation solution,we demonstrate the atomic spatial population and the energy distribution of the systemare chaotic generally.

关键词： stationary state classical chaos two-component Bose-Einstein condensates optical lattice potential