Nonlocality tests enhanced by a third observer
arXiv:1110.3656 · doi:10.1103/PhysRevLett.108.040402
Abstract
We consider Bell tests involving bipartite states shared between three parties. We show that the simple inclusion of a third part may greatly simplify the measurement scenario (in terms of the number of measurement settings per part) and allows the identification of previously unknown nonlocal resources.
4 pags, 4 figs. v2: fig 3 corrected. V3: refs corrected. Close to published version
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