期刊：
Journal of Modern Optics,2005年52(18):2743-2758 ISSN：0950-0340
通讯作者：
Li, GX
作者机构：
[Ke, SS; Li, GX] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Li, GX] H;Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
摘要：
The entanglement property between two two-level atoms interacting with a stochastic field is studied. We analytically prove that when the correlation time κ −1 of the stochastic field is very short compared to the radiative lifetime γ −1 of the atom, the steady-state entanglement between the two atoms can appear. The concurrence characterizing the entanglement degree has also been calculated by using Monte Carlo simulation. It is shown that the correlation time has a strong effect on the entanglement. We also discuss the influence of strength of the stochastic process on the entanglement. The validity of the decorrelation approximation is also investigated.
作者机构：
[Giannakis, I] Rockefeller Univ, Dept Phys, New York, NY 10021 USA.;Cent China Normal Univ, Inst Particle Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Giannakis, I] R;Rockefeller Univ, Dept Phys, New York, NY 10021 USA.
摘要：
In this Letter we construct analytically a LOFF color superconducting state that is both color and charge neutral using the weak coupling approximation. We demonstrate that this state is free from chromomagnetic instabilities. Its relevance to the realistic quark matter at moderately high baryon density is discussed.
作者机构：
[Hou, XW] Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.;Hong Kong Baptist Univ, Ctr Nonlinear Studies, Dept Phys, Hong Kong, Hong Kong, Peoples R China.;Hong Kong Baptist Univ, Beijing Hong Kong Singapore Joint Ctr Nonlinear &, Hong Kong, Hong Kong, Peoples R China.;Huazhong Normal Univ, Dept Informat Management, Wuhan 430079, Peoples R China.;Univ Houston, Dept Phys, Houston, TX 77204 USA.
通讯机构：
[Hou, XW] H;Huazhong Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
摘要：
In this Brief Report the properties of both dynamical and static entanglement in the integrable quantum dimer are studied in terms of the reduced-density linear entropy and von Neumann entropy with various coupling parameters, total boson numbers, and initial states. The mean entanglement, which is defined to be averaged over time, is used to describe the influence of the classical separatrix on the behavior of entanglement. It is shown that the mean entanglement exhibits a maximum near the position of the corresponding classical separatrix energy and that the static entanglement of the state with the largest eigenvalue of the quantum spectrum displays a maximum near the bifurcation point. For weak coupling and larger total boson number the maximum entanglement state is exactly at the position of the classical separatrix and bifurcation. In strong coupling all initial states have nearly the same mean entanglement.
期刊：
Journal of Solid State Chemistry,2005年178(5):1488-1494 ISSN：0022-4596
通讯作者：
Yu, Y
作者机构：
[Yu, Y] Huazhong Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;Chinese Univ Hong Kong, Dept Biol, Shatin, Hong Kong, Peoples R China.;Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China.
通讯机构：
[Yu, Y] H;Huazhong Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
作者机构：
[Huang, XT] Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.;Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China.
通讯机构：
[Huang, XT] C;Cent China Normal Univ, Coll Phys Sci & Technol, Wuhan 430079, Peoples R China.
关键词：
电阻测量;碳纳米管;临界值;电子循环分布;薄膜物理学
摘要：
Aiming at the difficulty in the electrical resistance measurement, we develop a simple statistical model for the carbon nanotubes adequately dispersed in available insulated liquid and introduce the concept of ``the most probability''. Based on this model, we obtain the function between macroscopic resistance R and resistance of an individual nanotube, R0, from which one can calculate the resistance of an individual nanotube by measuring the macroscopic resistance. By computational simulation, we prove the reliability of the model. Then, we analyse the feasibility of the model when applied to experiment.
作者机构：
[Ding, XX; Huang, ZX; Gan, ZW; Tang, C; Huang, XT; Cheng, C; Qi, SR] Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
通讯机构：
[Gan, ZW] C;Cent China Normal Univ, Dept Phys, Wuhan 430079, Peoples R China.
关键词：
Oxide;Silicon;Thin Film;SiO2;Boron
摘要：
A novel method was demonstrated to fabricate boron nitride nanotube films on silicon substrate in a location-controlled fashion. The pre-deposited SiO2 layer on the substrate controls the growth space of BN nanotubes synthesized by an ammonothermal reaction of boron and its oxide.
摘要：
Single-crystal and uniform aluminum borate (Al4B2O9)-coited aluminum oxide nanowires have been synthesized in high purity and in large yield via a reaction or metal aluminum with boron oxide in the presence of carbon nanotubes (CNTs). The aluminum oxide nanowires exhibit a well-crystallized one-dimensional structure with diameters ranging front 50 to 70 nm, and the Al4B2O9 have a coating thickness of about 1 5nm. CNTs play a crucial role in the formation of the important ceramic nanowires, by providing a platform to grow the composite structure. The growth mechanism was proposed by the detailed microscopy observations. (c) 2005 Elsevier Inc. All rights reserved.
作者机构：
[Xia, Ying-Qing; Yang, He-Lin; Wen, Ding-E; Liu, Wu] College of Physical Science and Technology, Huazhong Normal University, Wuhan, Hubei, China;[Liu, Zhen-Lai] Department of Physics, Hexi University, Zhangye, Gansu, China;[Lu, Shu] School of Electronic Information, Wuhan University, Wuhan, Hubei, China
通讯机构：
[Yang He-lin] C;College of Physical Science and Technology, Huazhong Normal University, Wuhan, Hubei, China
关键词：
moment method;radar cross section;rivet;plate
摘要：
The electromagnetic (EM) scattering by rivets on the conducting plate is studied for the first time by using electric field integral equation (EFIE) in conjunction with the moment method. The surfaces of the rivets and the plate are partitioned into triangular cells, the current distribution on the patches is represented by sub-domain type basis function, the EFIE is translated into matrix equation by the Galerkin method, then the current coefficient is obtained. The results show the properties of radar cross section (RCS) varying with the incident angle when there are rivets on the plate.
摘要：
With rapid development of electronic imaging and multimedia technology, the telemedicine is applied to modern medical servings in the hospital. Digital medical image is characterized by high resolution, high precision and vast data. The optimized compression algorithm can alleviate restriction in the transmission speed and data storage. This paper describes the characteristics of human vision system based on the physiology structure, and analyses the characteristics of medical image in the telemedicine, then it brings forward an optimized compression algorithm based on wavelet zerotree. After the image is smoothed, it is decomposed with the haar filters. Then the wavelet coefficients are quantified adaptively. Therefore, we can maximize efficiency of compression and achieve better subjective visual image. This algorithm can be applied to image transmission in the telemedicine. In the end, we examined the feasibility of this algorithm with an image transmission experiment in the network.
