Functional Bell inequalities can serve as a stronger entanglement witness
arXiv:quant-ph/0206165 · doi:10.1103/PhysRevA.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.
4 pages, REVTeX4
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