Bell-type inequalities to detect true n-body non-separability

Details Bell-type inequalities to detect true n-body non-separability Bell-type inequalities to detect true n-body non-separability

2002-01-14

arxiv.org/abs/quant-ph/0201058v2

Phys. Rev. Lett. 88, 170405 (2002)

Physics

Quantum Physics

4 pages, no figures, minor revisions

Scientific paper

10.1103/PhysRevLett.88.170405

We analyze the structure of correlations among more than two quantum systems. We introduce a classification of correlations based on the concept of non-separability, which is different {\em a priori} from the concept of entanglement. Generalizing a result of Svetlichny [Phys. Rev. D {\bf 35} (1987) 3066] on 3-particle correlations, we find an inequality for $n$-particle correlations that holds under the most general separability condition and that is violated by some quantum-mechanical states.

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