Entanglement of formation for one-dimensional magnetic systems with defects

被引：29

作者：

Huang, Z ^{[1
]}

Osenda, O ^{[1
]}

Kais, S ^{[1
]}

机构：

[1] Purdue Univ, Dept Chem, W Lafayette, IN 47907 USA

来源：

PHYSICS LETTERS A | 2004年 / 322卷 / 3-4期

关键词：

entanglement of formation; magnetic systems; defects;

D O I：

10.1016/j.physleta.2004.01.022

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a study of the entanglement of formation for one-dimensional magnetic systems with defects. The concurrence was used as a measure of entanglement. Rather than locating the impurity at one site in the chain, there is a Gaussian. distribution of disorder near a particular location. We demonstrate that the entanglement can be tuned by varying the strength of the external magnetic field and the distribution of impurities. The concurrence is a maximum close to the critical point, where a quantum phase transition occurs, and for certain parameters can be tuned to zero above the critical point. (C) 2004 Elsevier B.V. All rights reserved.

引用

页码：137 / 145

页数：9

共 26 条

[1]

[Anonymous], 2000, QUANTUM COMPUTATION

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