Violating Bell's inequality beyond Cirel'son's bound

被引：28

作者：

Cabello, A ^{[1
]}

机构：

[1] Univ Seville, Dept Fis Aplicada 2, E-41012 Seville, Spain

来源：

PHYSICAL REVIEW LETTERS | 2002年 / 88卷 / 06期

关键词：

D O I：

10.1103/PhysRevLett.88.060403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Cirel'son inequality states that the absolute value of the combination of quantum correlations appearing in the Clauser-Horne-Shimony-Holt (CHSH) inequality is bound by 2root2. It is shown that the correlations of two qubits belonging to a three-qubit system can violate the CHSH inequality beyond 2root2. Such a violation is not in conflict with Cirel'son's inequality because it is based on postselected systems. The maximum allowed violation of the CHSH inequality, 4, can be achieved using a Greenberger-Horne-Zeilinger state.

引用

页数：4

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