Entanglement in a two-spin (1/2,3/2) mixed-spin Heisenberg XX chain with an inhomogeneous external magnetic field

被引：15

作者：

Guo KeTao ^{[1
]}

Liang MingChao ^{[1
]}

Xu HongYu ^{[1
]}

Zhu ChengBo ^{[1
]}

机构：

[1] Jiangxi Univ Sci & Technol, Sch Appl Sci, Ganzhou 341000, Peoples R China

来源：

SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY | 2011年 / 54卷 / 03期

关键词：

entanglement; mixed-spin; negativity; quantum transition; QUANTUM; SEPARABILITY; STATE;

D O I：

10.1007/s11433-011-4257-5

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

By using the concept of negativity, we investigate the thermal entanglement of a two-spin (1/2, 3/2) mixed-spin Heisenberg XX chain with an inhomogeneous external magnetic field. We obtain the analytical results of entanglement of this model. For the case of uniform magnetic field, we find that the critical temperature is higher than the results of the spin-1/2 chain and (1/2,1) mixed-spin chain. And by adjusting the nonuniform parameter b, one is able to obtain more entanglement at a higher temperature.

引用

页码：491 / 495

页数：5

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