Bell-type inequality and tripartite nonlocality in three-qubit GHZ-class states

被引：5
|
作者：
Zhao Jia-Qiang [1 ]
Cao Lian-Zhen [1 ]
Lu Huai-Xin [1 ]
Wang Xiao-Qin [1 ]
机构：
[1] Weifang Univ, Dept Phys & Optoelect Engn, Shandong Prov Key Lab Multiphoton Entanglement &, Weifang 261061, Peoples R China
来源：
ACTA PHYSICA SINICA | 2013年 / 62卷 / 12期
基金：
中国国家自然科学基金;
关键词：
quantum information; GHZ-type states; concurrence; Bell-type inequalities; ENTANGLEMENT;
D O I：
10.7498/aps.62.120301
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
In this paper, we theoretically study the relation between concurrence and nonlocality depicted by Bell-type inequality violation of quantum mechanics prediction versus local realism prediction for the GHZ (Greenberger -Horne-Zeilinger) class states. Analytical expressions of concurrence, violations of the Mermin inequality and the Svetlichny inequality are obtained. Through numerical calculations, the relationship between entanglement and nonlocality of GHZ-class states is discussed. Our results show that the concurrence is consistent with the degree of nonlocality described by violations of the two Bell-type inequalities of GHZ-class states. The Bell operator and its parameters can obviously reveal the nonlocal features of quantum states.
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页数：4
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