Experimental violation of Svetlichny's inequality

Details Experimental violation of Svetlichny's inequality Experimental violation of Svetlichny's inequality

2009-09-04

arxiv.org/abs/0909.0789v1

New J. Phys. 11 (2009) 073051

Physics

Quantum Physics

10 pages, 3 figures, 1 table

Scientific paper

10.1088/1367-2630/11/7/073051

It is well known that quantum mechanics is incompatible with local realistic theories. Svetlichny showed, through the development of a Bell-like inequality, that quantum mechanics is also incompatible with a restricted class of nonlocal realistic theories for three particles where any two-body nonlocal correlations are allowed [Phys. Rev. D 35, 3066 (1987)]. In the present work, we experimentally generate three-photon GHZ states to test Svetlichny's inequality. Our states are fully characterized by quantum state tomography using an overcomplete set of measurements and have a fidelity of (84+/-1)% with the target state. We measure a convincing, 3.6 std., violation of Svetlichny's inequality and rule out this class of restricted nonlocal realistic models.

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