Optimal Bell tests do not require maximally entangled states -: art. no. 210402

被引：70
|
作者：
Acín, A
Gill, R
Gisin, N
机构：
[1] ICFO Inst Ciencies Foton, Castelldefels 08860, Barcelona, Spain
[2] Univ Utrecht, Inst Math, NL-3508 TA Utrecht, Netherlands
[3] Univ Geneva, GAP Opt, CH-1211 Geneva, Switzerland
来源：
PHYSICAL REVIEW LETTERS | 2005年 / 95卷 / 21期
关键词：
D O I：
10.1103/PhysRevLett.95.210402
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Any Bell test consists of a sequence of measurements on a quantum state in spacelike separated regions. Thus, a state is better than others for a Bell test when, for the optimal measurements and the same number of trials, the probability of existence of a local model for the observed outcomes is smaller. The maximization over states and measurements defines the optimal nonlocality proof. Numerical results show that the required optimal state does not have to be maximally entangled.
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