A lower bound of concurrence for multipartite quantum states

被引：68

作者：

Li, Ming ^{[1
]}

Fei, Shao-Ming ^{[1
,2
]}

Wang, Zhi-Xi ^{[1
]}

机构：

[1] Capital Normal Univ, Dept Math, Beijing 100037, Peoples R China

[2] Univ Bonn, Inst Angew Math, D-53115 Bonn, Germany

来源：

JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL | 2009年 / 42卷 / 14期

关键词：

ENTANGLEMENT;

D O I：

10.1088/1751-8113/42/14/145303

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We study the concurrence of arbitrary multipartite mixed quantum states. An explicit lower bound of the concurrence is derived, which detects quantum entanglement of some states better than some separability criteria, and gives sufficient conditions for distilling GHZ states from tripartite states. An interesting relation between the lower bound of the concurrence for bipartite states and for tripartite states has been presented.

引用

页数：7

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