Entanglement and Non-Markovianity of Quantum Evolutions

A. Rivas, S.F. Huelga, M.B. Plenio

    Research output: Contribution to journalArticlepeer-review

    608 Citations (Scopus)


    We address the problem of quantifying the non-Markovian character of quantum time evolutions of general systems in contact with an environment. We introduce two different measures of non-Markovianity that exploit the specific traits of quantum correlations and are suitable for opposite experimental contexts. When complete tomographic knowledge about the evolution is available, our measure provides a necessary and sufficient condition to quantify strictly the non-Markovianity. In the opposite case, when no information whatsoever is available, we propose a sufficient condition for non-Markovianity. Remarkably, no optimization procedure underlies our derivation, which greatly enhances the practical relevance of the proposed criteria.
    Original languageEnglish
    Article number050403
    JournalPhysical Review Letters
    Issue number5
    Publication statusPublished - 2010


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