检索结果-南通市图书馆

Decoherence of Entangled states Calculated by a Systematic Approximate Method

Communications in Theoretical Physics 2007年第5期47卷 791-800页

作者： LIU Tao FAN Yun-Xia HUANG Shu-Weng WANG Ke-Lin WANG Yi School of Sciences Southwest University of Science and Technology Mianyang 621010 China Department of Modern Physics University of Science and Technology of China Hefei 230026 China Institute of Thin Films and Nano-materials Wuyi University Jiangmen 529020 China

In this paper the coherent-state approximation （CA） method is used to deal with the problem of the decoherence of the entangled states of two two-state systems. As the base of the discussion, the dissipation of one two-state system has been investigated at first. The improved results calculated by CA are given in the paper. It is shown that the right approaching behavior and scaling law have been obtained when CA is applied to the problem of dissipation of two two-state systems coupled with environment. The whole evolution process and calculated results of the decoherence of the entangled states show also the scaling law, right approaching behavior, and rich phenomenon.

关键词： decoherence coherent-state two-state

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Features of the polaron ground state in one-dimensional Holstein model

引用

Science China(Physics,Mechanics & Astronomy) 2009年第9期52卷 1302-1306页

作者： REN XueZao LIAO Xu LI Lei WANG KeLin School of Science Southwest University of Science and TechnologyMianyang 621010China Department of Modern Physics University of Science and Technology of ChinaHefei 230026China

Applying the method of coherent state orthogonal expansion, we expand the trial wave functions of ground state to the third order. We find that the ground state energy of the system decreases with the increase of expansion orders. Especially, at the zeroth order approximation, the probability distribution of the electron at different sites exhibits a soliton peak. However, the probability distribution of the electron at each site becomes identical, when we expand the trial wave functions of ground state to the higher orders.

关键词： coherent-state orthogonal expansion polaron simulated annealing method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A new approximating method for Holstein model

引用

Science China(Physics,Mechanics & Astronomy) 2010年第1期53卷 44-48页

作者： REN XueZao 1 , LIAO Xu 1 , LI Lei 1 & WANG KeLin 2 1 School of Science, Southwest University of Science and Technology, Mian Yang 621010, China 2 Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China School of Science Southwest University of Science and Technology Mian Yang China Department of Modern Physics University of Science and Technology of China Hefei China

A new approach-the method of coherent state orthogonal expansion is developed for one-dimensional Holstein model. In zeroth order approximation, the formula of ground state energy is deduced analytically and the solutions in strong- and weak-coupling limits are obtained correctly. When the trial wave-function of ground state is expanded to the second order, the obtained ground state energy agrees quite well with that calculated by numerical method in all coupling regimes. The present approach can be easily generalized to the situations of higher dimensions and more electrons.

关键词： coherent-state orthogonal expansion polaron simulated annealing method

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：