Two-qubit Bell inequality for which positive operator-valued measurements are relevant

T. Vértesi, E. Bene

Research output: Contribution to journalArticle

22 Citations (Scopus)

Abstract

A bipartite Bell inequality is derived which is maximally violated on the two-qubit state space if measurements describable by positive operator valued measure (POVM) elements are allowed, rather than restricting the possible measurements to projective ones. In particular, the presented Bell inequality requires POVMs in order to be maximally violated by a maximally entangled two-qubit state. This answers a question raised by N. Gisin [in Quantum Reality, Relativistic Causality, and Closing the Epistemic Circle: Essays in Honour of Abner Shimony, edited by W. C. Myrvold and J. Christian (Springer, The Netherlands, 2009), pp. 125-138].

Original languageEnglish
Article number062115
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume82
Issue number6
DOIs
Publication statusPublished - Dec 27 2010

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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