The thermal entanglement in a spin-1 Heisenberg X X Z chain*

被引：0

作者：

Ni, Huiying ^{[1
]}

Fang, Jianxing ^{[1
]}

Zhou, Xiaoyan ^{[1
]}

Gu, Shuiheng ^{[1
]}

机构：

[1] Suzhou Univ, Sch Phys Sci & Technol, Suzhou 215006, Peoples R China

来源：

QUANTUM OPTICS, OPTICAL DATA STORAGE, AND ADVANCED MICROLITHOGRAPHY | 2008年 / 6827卷

关键词：

heisenberg chain; thermal entanglement; negativity; magnetic field; temperature; XXZ chain; spin; density matrix;

D O I：

暂无

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, the entanglement in a spin-1 Heisenberg XXZ chain with uniform and nonuniform external magnetic field is investigated in the terms of the measure of entanglement called 'negativity'. The effects of the external magnetic field, the anisotropy parameter and the temperature on the negativity are discussed respectively. It can be seen that the entanglement in this spin chain for any temperature is symmetric with respect to zero magnetic field. We calculate the partially transposed density matrix and give qualitatively results at different temperatures. In order to show the results clearly, the behavior of negativity is presented for five different cases. It can be found that the temperature and the external magnetic field can effect the feature of the thermal entanglement significantly. In addition, under certain condition, the negativity may be enhanced under a nonuniform magnetic field.

引用

页码：82704 / 82704

页数：12

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