Experimental verification of quantum discord in continuousvariable states and operational significance of discord consumption

Sara Hosseini, S Rahimi-Keshari, Jing-Yan Haw, Syed Assad, Helen Chrzanowski, Jiri Janousek, Thomas Symul, Ping Lam, Timothy Cameron Ralph, Mile Gu, Kavan Modi, Vlatko Vedral

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    Abstract

    We introduce a simple and efficient technique to verify quantum discord in unknown Gaussian states and certain class of non-Gaussian states. We show that any separation in the peaks of the marginal distributions of one subsystem conditioned on two different outcomes of homodyne measurements performed on the other subsystem indicates correlation between the corresponding quadratures and hence nonzero quantum discord. We also demonstrate that under certain measurement constraints, discord between bipartite systems can be consumed to encode information that can only be accessed by coherent quantum interaction.
    Original languageEnglish
    Title of host publicationOptics InfoBase Conference Papers
    Place of PublicationSan Jose USA
    PublisherOptica Publishing Group
    Pages(2 pp)
    EditionPeer Reviewed
    ISBN (Print)9781557529992
    Publication statusPublished - 2014
    EventOSA CLEO: QELS_Fundamental Science, CLEO_QELS 2014 - San Jose USA
    Duration: 1 Jan 2014 → …

    Conference

    ConferenceOSA CLEO: QELS_Fundamental Science, CLEO_QELS 2014
    Period1/01/14 → …
    OtherJune 8-13 2014

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