Semiclassical analysis of the nonequilibrium local polaron

A. Mitra, I. Aleiner, A. J. Millis

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A resonant level strongly coupled to a local phonon under nonequilibrium conditions is investigated. The nonequilibrium Hartree-Fock approximation is shown to correspond to approximating the steady state density matrix by delta functions at field values to which the local dynamics relaxes in a semiclassical limit. If multiple solutions exist, all are shown to make nonvanishing contributions to physical quantities: multistability does not exist. Departures from equilibrium are shown to produce decoherence, preventing the formation of a polaron feature in the spectral function. The formalism also applies to the nonequilibrium Kondo problem.

    Original languageEnglish (US)
    Article number076404
    JournalPhysical Review Letters
    Volume94
    Issue number7
    DOIs
    StatePublished - Feb 25 2005

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

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