Maximally entangled states and fully entangled fraction

被引:13
作者
Zhao, Ming-Jing [1 ]
机构
[1] Beijing Informat Sci & Technol Univ, Sch Sci, Dept Math, Beijing 100192, Peoples R China
来源
PHYSICAL REVIEW A | 2015年 / 91卷 / 01期
关键词
QUANTUM STATE;
D O I
10.1103/PhysRevA.91.012310
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We study maximally entangled states and fully entangled fraction in general d' circle times d (d' >= d) systems. Necessary and sufficient conditions for maximally entangled pure and mixed states are presented. As a natural generalization of the usual fully entangled fraction for d circle times d systems, we define the maximal overlap between a given quantum state and the maximally entangled states as the fully entangled fraction in d' circle times d systems. The properties of this fully entangled fraction and its relations to quantum teleportation have been analyzed. The witness for detecting maximally entangled states and quantum states that are useful for quantum teleportation is provided.
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页数:5
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