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Violation of Bell's inequality: criterion for quantum communication complexity advantage

Caslav Brukner, Marek Zukowski, Jian-Wei Pan, Anton Zeilinger

Phys. Rev. Lett. 92, 127901 (2004)
4 pages, 1 figure
Licence : non indiquée (tous droits réservés)

Résumé : We prove that for every Bell's inequality and for a broad class of protocols, there always exists a multi-party communication complexity problem, for which the protocol assisted by states which violate the inequality is more efficient than any classical protocol. Moreover, for that advantage Bell's inequality violation is a necessary and sufficient criterion. Thus, violation of Bell's inequalities has a significance beyond that of a non-optimal-witness of non-separability.

Soumis à arXiv le 14 Oct. 2002