Transport across an impurity in one-dimensional quantum liquids far from equilibrium

Marco Schiró, Aditi Mitra

    Research output: Contribution to journalArticle

    Abstract

    We study the effect of a single impurity on the transport properties of a one-dimensional quantum liquid highly excited away from its ground state by a sudden quench of the bulk interaction. In particular we compute the time-dependent dc current to leading order in the impurity potential, using bosonization and starting both from the limit of a uniform system and from the limit of two decoupled semi-infinite systems. Our results reveal that the nonequilibrium excitation of bulk modes induced by the global quench has important effects on the conductor-insulator quantum phase transition, turning it into a crossover for any small quench amplitude and destroying the exact duality between the conducting and insulating fixed points. In addition, the current displays a faster decay towards the steady state than the equilibrium case, a signature of quench-induced decoherence.

    Original languageEnglish (US)
    Article number235126
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume91
    Issue number23
    DOIs
    StatePublished - Jun 15 2015

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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