Bell's inequalities and quantum communication complexity

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

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    Abstract

    The study showed that the necessary and sufficient condition for quantum protocols to have a higher success rate than any classical protocol is that the state violates a Bell inequality. For every Bell inequality, it was shown that, there always exists a communication complexity problem (CCP), for which the protocol assisted by states which violate the inequality is more efficient than any classical protocol. A quantum competitor was introduced before showing the maximum probability of success in a protocol. It was also shown that the results could be generalized to Bell inequalities with higher-dimensional systems and more measurement settings.
    Original languageEnglish
    Article number127901
    Number of pages4
    JournalPhysical Review Letters
    Volume92
    Issue number12
    DOIs
    Publication statusPublished - 2004

    Austrian Fields of Science 2012

    • 103026 Quantum optics

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