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Hardy's nonlocality for generalized n-particle GHZ states

Jose L. Cereceda
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Abstract

In this paper we extend Hardy's nonlocality proof for two spin-1/2 particles [PRL 71 (1993) 1665] to the case of n spin-1/2 particles configured in the generalized GHZ state. We show that, for all n \geq 3, any entangled GHZ state violates the Bell inequality associated with the Hardy experiment. This feature is important since it has been shown [PRL 88 (2002) 210402] that, for all n odd, there are entangled GHZ states that do not violate any standard n-particle correlation Bell inequality.

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Jose L. Cereceda. 2004-06-24. Hardy's nonlocality for generalized n-particle GHZ states. https://doi.org/10.1016/j.physleta.2004.06.004

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