Pairwise Quantum Correlations for Superpositions of Dicke States

被引：4

作者：

Xi Zheng-Jun ^{[1
,2
]}

Xiong Heng-Na ^{[2
]}

Li Yong-Ming ^{[1
]}

Wang Xiao-Guang ^{[2
]}

机构：

[1] Shaanxi Normal Univ, Coll Comp Sci, Xian 710062, Peoples R China

[2] Zhejiang Univ, Dept Phys, Zhejiang Inst Modern Phys, Hangzhou 310027, Peoples R China

来源：

COMMUNICATIONS IN THEORETICAL PHYSICS | 2012年 / 57卷 / 05期

关键词：

quantum correlation; quantum discord; entanglement; Dicke states; ENTANGLEMENT; NONLOCALITY; DISCORD;

D O I：

10.1088/0253-6102/57/5/06

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Pairwise correlation is really an important property for multi-qubit states. For the two-qubit X states extracted from Dicke states and their superposition states, we obtain a compact expression of the quantum discord by numerical check. We then apply the expression to discuss the quantum correlation of the reduced two-qubit states of Dicke states and their superpositions, and the results are compared with those obtained by entanglement of formation, which is a quantum entanglement measure.

引用

页码：771 / 779

页数：9

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