Criteria for dynamically stable decoherence-free subspaces and incoherently generated coherences

Raisa I. Karasik, Karl-Peter Marzlin, Barry C. Sanders, K. Birgitta Whaley

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    Abstract

    We present a detailed analysis of decoherence free subspaces and develop a rigorous theory that provides necessary and sufficient conditions for dynamically stable decoherence free subspaces. This allows us to identify a special class of decoherence free states which rely on incoherent generation of coherences. We provide examples of physical systems that support such states. Our approach employs Markovian master equations and applies primarily to finite-dimensional quantum systems.
    Original languageEnglish
    Pages (from-to)052301-1-052301-12
    Number of pages12
    JournalPhysical Review A - Atomic, Molecular, and Optical Physics
    Volume77
    Issue number5
    DOIs
    Publication statusPublished - 2008

    Bibliographical note

    Raisa I. Karasik, Karl-Peter Marzlin, Barry C. Sanders, and K. Birgitta Whaley, Physical review A, Vol. 77, Iss. 5, 052301 (2008). Copyright 2008 by the American Physical Society. The original article can be found at http://dx.doi.org/10.1103/PhysRevA.77.052301

    Keywords

    • eigenvalues and eigenfunctions
    • master equation
    • quantum theory

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