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Detecting nonlocality in many-body quantum states

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Science  13 Jun 2014:
Vol. 344, Issue 6189, pp. 1256-1258
DOI: 10.1126/science.1247715

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Testing nonlocality for many particles

Distant parts of a quantum-mechanical system can be correlated in ways that cannot be described classically—a concept known as nonlocality. Tura et al. propose a simple test for nonlocality in systems with multiple particles. The test involves quantities that should readily be measurable in, for example, cold atom experiments. This is an improvement over currently available tests, which are difficult to implement experimentally.

Science, this issue p. 1256

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