Thermal Entanglement in Lipkin-Meshkov-Glick Model

被引：1
|
作者：
Du Long [1 ]
Zhang Wen-Xin [1 ]
Ding Jia-Yan [1 ]
Wang Guo-Xiang [1 ]
Hou Jing-Min [1 ]
机构：
[1] Southeast Univ, Dept Phys, Nanjing 211189, Peoples R China
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2011年 / 56卷 / 01期
基金：
中国国家自然科学基金;
关键词：
thermal entanglement; Lipkin-Meshkov-Glick model; concurrence; QUANTUM-MECHANICAL DESCRIPTION; PHYSICAL REALITY; PHASE-TRANSITION; CHAIN;
D O I：
10.1088/0253-6102/56/1/11
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We investigate the thermal entanglement in the Lipkin-Meshkov-Glick (LMG) model which consists of spin-1/2 particles with XXZ-type exchange interactions between any pair of them. The ferromagnetic (FM) and antiferromagnetic (AFM) cases are completely analyzed at both finite temperature and zero temperature. According to the results obtained by accurate numerical calculation, several interesting physic phenomena and characteristics of thermal entanglement in the LMG model are found. Not only do we evaluate the entanglement of the LMG model, but also discover the correlations between macroscopic physical quantities and thermal entanglement.
引用
收藏
页码：61 / 66
页数：6
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