Violations of local realism by two entangled quNits

Details Violations of local realism by two entangled quNits Violations of local realism by two entangled quNits

2001-06-27

arxiv.org/abs/quant-ph/0106156v2

Physics

Quantum Physics

Reference added, 3 pages, accepted for publication in J. Phys. A: Math. and General

Scientific paper

10.1088/0305-4470/34/35/309

Results obtained in two recent papers, \cite{Kaszlikowski} and \cite{Durt}, seem to indicate that the nonlocal character of the correlations between the outcomes of measurements performed on entangled systems separated in space is not robust in the presence of noise. This is surprising, since entanglement itself is robust. Here we revisit this problem and argue that the class of gedanken-experiments considered in \cite{Kaszlikowski} and \cite{Durt} is too restrictive. By considering a more general class, involving sequences of measurements, we prove that the nonlocal correlations are in fact robust.

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