Negativity in the extended Hubbard model under external magnetic field

被引：3
|
作者：
Zhen, Yang [1 ,2 ]
Ning Wen-Qiang [1 ,2 ]
机构：
[1] Fudan Univ, Dept Phys, Shanghai 200433, Peoples R China
[2] Chinese Univ Hong Kong, Dept Phys, Hong Kong, Hong Kong, Peoples R China
来源：
CHINESE PHYSICS LETTERS | 2008年 / 25卷 / 01期
关键词：
D O I：
10.1088/0256-307X/25/1/009
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We exactly calculate the negativity, a measurement of entanglement, in the two-site extended Hubbard model with external magnetic field. Its behaviour at different temperatures is presented. The negativity reduces with the increasing temperature or with the increasing uniform external magnetic field. It is also found that a non-uniform external magnetic field can be used to modulate or to increase the negativity.
引用
收藏
页码：31 / 34
页数：4
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