Lower Bound of Concurrence Based on Generalized Positive Maps

作     者：秦慧慧 费少明 

作者机构：Department of Mathematics School of Science South China University of Technology School of Mathematical Sciences Capital Normal University Max-Planck-Institute for Mathematics in the Sciences 

出 版 物：《Communications in Theoretical Physics》 (理论物理通讯（英文版）)

年 卷 期：2013年第60卷第12期

页      面：663-666页

核心收录：

学科分类：070207[理学-光学] 07[理学] 0704[理学-天文学] 0702[理学-物理学] 

基　　金：Supported by the National Natural Science Foundation of China under Grant No.11275131 

主　　题：正映射 下限 广义 量子系统 下界 纠缠 

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.