Bell's inequalities for states with positive partial transpose

Details Bell's inequalities for states with positive partial transpose Bell's inequalities for states with positive partial transpose

1999-10-14

arxiv.org/abs/quant-ph/9910063v1

Phys. Rev. A 61, 062102 (2000)

Physics

Quantum Physics

4 pages, REVTeX

Scientific paper

10.1103/PhysRevA.61.062102

We study violations of n particle Bell inequalities (as developed by Mermin and Klyshko) under the assumption that suitable partial transposes of the density operator are positive. If all transposes with respect to a partition of the system into p subsystems are positive, the best upper bound on the violation is 2^((n-p)/2). In particular, if the partial transposes with respect to all subsystems are positive, the inequalities are satisfied. This is supporting evidence for a recent conjecture by Peres that positivity of partial transposes could be equivalent to existence of local classical models.

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