Phys. Rev. A 66, 052309 (2002) [5 pages]Multipartite bound entanglement and three-setting Bell inequalitiesReceived 27 June 2002; published 18 November 2002 It was shown by Dur [Phys. Rev. Lett. 87, 230402 (2001)] that N (N>~4) qubits described by a certain one-parameter family F of bound entangled states violate the Mermin-Klyshko inequality for N>~8. In this paper we prove that the states from the family F violate Bell inequalities derived by Żukowski and Kaszlikowski [Phys. Rev. A 56, R1682 (1997)], in which each observer measures three noncommuting sets of orthogonal projectors, for N>~7. We also derive a simple one-parameter family of entanglement witnesses that detect entanglement for all the states belonging to F. It is possible that these entanglement witnesses could be generated by some Bell inequalities. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevA.66.052309
DOI:
10.1103/PhysRevA.66.052309
PACS:
03.67.-a
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