Information causality from an entropic and a probabilistic perspective

Sabri W. Al-Safi, Anthony J. Short

Research output: Contribution to journalArticle (Academic Journal)peer-review

19 Citations (Scopus)


The information causality principle is a generalization of the no-signaling principle which implies some of the known restrictions on quantum correlations. But despite its clear physical motivation, information causality is formulated in terms of a rather specialized game and figure of merit. We explore different perspectives on information causality, discussing the probability of success as the figure of merit, a relation between information causality and the nonlocal "inner-product game," and the derivation of a quadratic bound for these games. We then examine an entropic formulation of information causality with which one can obtain the same results, arguably in a simpler fashion.

Original languageEnglish
Article number042323
Pages (from-to)-
Number of pages6
JournalPhysical Review A: Atomic, Molecular and Optical Physics
Issue number4
Publication statusPublished - 11 Oct 2011


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