Lower Bound of Concurrence Based on Generalized Positive Maps

被引：3
|
作者：
Qin Hui-Hui [1 ]
Fei Shao-Ming [2 ,3 ]
机构：
[1] S China Univ Technol, Sch Sci, Dept Math, Guangzhou 510640, Guangdong, Peoples R China
[2] Capital Normal Univ, Sch Math Sci, Beijing 100048, Peoples R China
[3] Max Planck Inst Math Sci, D-04103 Leipzig, Germany
来源：
COMMUNICATIONS IN THEORETICAL PHYSICS | 2013年 / 60卷 / 06期
基金：
中国国家自然科学基金;
关键词：
lower bound of concurrence; positive maps; QUANTUM ENTANGLEMENT;
D O I：
10.1088/0253-6102/60/6/05
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
We study the concurrence of arbitrary dimensional bipartite quantum systems. By using a positive but not completely positive map, we present an analytical lower bound of concurrence. Detailed examples are used to show that our bound can detect entanglement better and can improve the well known existing lower bounds.
引用
收藏
页码：663 / 666
页数：4
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