Comprehensive test of entanglement for two-level systems via the indeterminacy relationship

被引：32

作者：

Yu, SX ^{[1
]}

Pan, JW

Chen, ZB

Zhang, YD

机构：

[1] Univ Sci & Technol China, Dept Modern Phys, Hefei 230027, Peoples R China

[2] Univ Vienna, Inst Expt Phys, A-1090 Vienna, Austria

[3] CCAST, World Lab, Beijing 100080, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2003年 / 91卷 / 21期

基金：

中国国家自然科学基金;

关键词：

D O I：

10.1103/PhysRevLett.91.217903

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

A 3-setting Bell-type inequality enforced by the indeterminacy relation of complementary local observables is proposed as an experimental test of 2-qubit entanglement. The proposed inequality has the advantage of being a sufficient and necessary criterion of separability. Therefore any entangled 2-qubit state cannot escape the detection by this kind of test. It turns out that the orientation of the local testing observables plays a crucial role in our perfect detection of entanglement.

引用

页数：4

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