Fully nonlocal quantum correlations

Details Fully nonlocal quantum correlations Fully nonlocal quantum correlations

2011-05-18

arxiv.org/abs/1105.3598v3

Phys. Rev. A 85, 032107 (2012)

Physics

Quantum Physics

9 pages, 5 figures and three tables. To appear in PRA

Scientific paper

Quantum mechanics is a nonlocal theory, but not as nonlocal as the no-signalling principle allows. However, there exist quantum correlations that exhibit maximal nonlocality: they are as nonlocal as any non-signalling correlations and thus have a local content, quantified by the fraction $p_L$ of events admitting a local description, equal to zero. Exploiting the link between the Kochen-Specker and Bell's theorems, we derive, from every Kochen-Specker proof, Bell inequalities maximally violated by quantum correlations. We then show that these Bell inequalities lead to experimental bounds on the local content of quantum correlations which are significantly better than those based on other constructions. We perform the experimental demonstration of a Bell test originating from the Peres-Mermin Kochen-Specker proof, providing an upper bound on the local content $p_L\lesssim 0.22$.

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