Quantum measurement incompatibility does not imply Bell nonlocality

被引:33
|
作者
Hirsch, Flavien [1 ]
Quintino, Marco Tulio [2 ]
Brunner, Nicolas [1 ]
机构
[1] Univ Geneva, Dept Appl Phys, CH-1211 Geneva, Switzerland
[2] Univ Tokyo, Grad Sch Sci, Dept Phys, Bunkyo Ku, Hongo 7-3-1, Tokyo 1130033, Japan
基金
英国工程与自然科学研究理事会; 瑞士国家科学基金会; 日本学术振兴会;
关键词
OBSERVABLES; STATES;
D O I
10.1103/PhysRevA.97.012129
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
We discuss the connection between the incompatibility of quantum measurements, as captured by the notion of joint measurability, and the violation of Bell inequalities. Specifically, we explicitly present a given set of non-jointly-measurable positive-operator-valuemeasures (POVMs) M-A with the following property. Considering a bipartite Bell test where Alice uses M-A, then for any possible shared entangled state rho and any set of (possibly infinitely many) POVMs N-B performed by Bob, the resulting statistics admits a local model and can thus never violate any Bell inequality. This shows that quantum measurement incompatibility does not imply Bell nonlocality in general.
引用
收藏
页数:7
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