Thermal entanglement in spin-dimer V4+ with a strong magnetic field

被引：11

作者：

Zhang, GF ^{[1
]}

Liang, JQ

Yan, QW

机构：

[1] Shanxi Univ, Inst Theoret Phys, Taiyuan 030006, Peoples R China

[2] Chinese Acad Sci, Inst Phys, Beijing 100080, Peoples R China

[3] Chinese Acad Sci, Ctr Condensed Matter Phys, Beijing 100080, Peoples R China

来源：

CHINESE PHYSICS LETTERS | 2003年 / 20卷 / 04期

关键词：

D O I：

10.1088/0256-307X/20/4/303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the entanglement in Heisenberg dimer single molecular magnets V4+ with a strong magnetic field by means of the measure of entanglement called "concurrence" and End that thermal entanglement exists for both the ferromagnetic (FM) and antiferromagnetic (AFM) cases. In the FM case, entanglement vanishes for anisotropic parameter lambda = 0 while in the AFM case, entanglement exits in the whole region of anisotropic parameter 0 less than or equal to lambda less than or equal to 1. Entanglement variations with anisotropic parameter lambda, magnetic field B and temperature T are evaluated. We find a critical magnetic field at which the concurrence changes sharply from zero to maximum entanglement.

引用

页码：452 / 455

页数：4

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