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.
@article{arxiv.1110.3656,
title = {Nonlocality tests enhanced by a third observer},
author = {Daniel Cavalcanti and Rafael Rabelo and Valerio Scarani},
journal= {arXiv preprint arXiv:1110.3656},
year = {2012}
}
Comments
4 pags, 4 figs. v2: fig 3 corrected. V3: refs corrected. Close to published version