Thermal entanglement in a two-spin-qutrit system under a nonuniform external magnetic field

被引：33
作者：
Zhang, GF
Li, SS
机构：
[1] Chinese Acad Sci, Inst Semicond, State Key Lab Superlattices & Microstruct, Beijing 100083, Peoples R China
[2] CCAST, World Lab, Beijing 100080, Peoples R China
来源：
EUROPEAN PHYSICAL JOURNAL D | 2006年 / 37卷 / 01期
关键词：
D O I：
10.1140/epjd/e2005-00235-1
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
The thermal entanglement in a two-spin-qutrit system with two spins coupled by exchange interaction under a magnetic field in an arbitrary direction is investigated. Negativity, the measurement of entanglement is calculated. We find that for any temperature the evolvement of negativity is symmetric with respect to magnetic field. The behavior of negativity is presented for four different cases. The results show that for different temperature; different magnetic field give maximum entanglement. Both the parallel and antiparallel magnetic field cases are investigated qualitatively (not quantitatively) in detail, we find that the entanglement may be enhanced under an antiparallel magnetic field.
引用
收藏
页码：123 / 127
页数：5
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