Random phase approximation study of one-dimensional fermions after a quantum quench

Jarrett Lancaster, Thierry Giamarchi, Aditi Mitra

    Research output: Contribution to journalArticle

    Abstract

    The effect of interactions on a system of fermions that are in a nonequilibrium steady state due to a quantum quench is studied employing the random phase approximation. As a result of the quench, the distribution function of the fermions is greatly broadened. This gives rise to an enhanced particle-hole spectrum and overdamped collective modes for attractive interactions between fermions. On the other hand, for repulsive interactions, an undamped mode above the particle-hole continuum survives. The sensitivity of the result to the nature of the nonequilibrium steady state is explored by also considering a quench that produces a current-carrying steady state.

    Original languageEnglish (US)
    Article number075143
    JournalPhysical Review B - Condensed Matter and Materials Physics
    Volume84
    Issue number7
    DOIs
    StatePublished - Aug 12 2011

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics

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