State-Independent Proof of Kochen-Specker Theorem with 13 Rays

被引：155

作者：

Yu, Sixia ^{[1
,2
,3
,4
]}

Oh, C. H. ^{[1
,2
]}

机构：

[1] Natl Univ Singapore, Ctr Quantum technol, Singapore 117543, Singapore

[2] Natl Univ Singapore, Dept Phys, Singapore 117543, Singapore

[3] Univ Sci & Technol China, Hefei Natl Lab Phys Sci Microscale, Hefei 230026, Anhui, Peoples R China

[4] Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2012年 / 108卷 / 03期

基金：

新加坡国家研究基金会;

关键词：

QUANTUM-MECHANICS; HIDDEN-VARIABLES; REALITY;

D O I：

10.1103/PhysRevLett.108.030402

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Quantum contextuality, as proved by Kochen and Specker, and also by Bell, should manifest itself in any state in any system with more than two distinguishable states and recently has been experimentally verified. However, for the simplest system capable of exhibiting contextuality, a qutrit, the quantum contextuality is verified only state dependently in experiment because too many (at least 31) observables are involved in all the known state-independent tests. Here we report an experimentally testable inequality involving only 13 observables that is satisfied by all noncontextual realistic models while being violated by all qutrit states. Thus our inequality facilitates a state-independent test of the quantum contextuality for an indivisible quantum system. We also provide a record-breaking state-independent proof of the Kochen-Specker theorem with 13 directions determined by 26 points on the surface of a magic cube.

引用

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