Functional Bell inequalities can serve as a stronger entanglement witness

Sen(De), Aditi ; Sen, Ujjwal ; \.ukowski, Marek (2002) Functional Bell inequalities can serve as a stronger entanglement witness Physical Review A, 66 (6).

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Official URL: https://doi.org/10.1103%2Fphysreva.66.062318

Abstract

We consider a Bell inequality for a continuous range of settings of the apparatus at each site. This "functional" Bell inequality gives a better range of violation for generalized GHZ states. Also a family of N-qubit bound entangled states violate this inequality for N>5.

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