Quench dynamics of one-dimensional interacting bosons in a disordered potential: Elastic dephasing and critical speeding-up of thermalization

Marco Tavora, Achim Rosch, Aditi Mitra

    Research output: Contribution to journalArticle

    Abstract

    The dynamics of interacting bosons in one dimension following the sudden switching on of a weak disordered potential is investigated. On time scales before quasiparticles scatter (prethermalized regime), the dephasing from random elastic forward scattering causes all correlations to decay exponentially fast, but the system remains far from thermal equilibrium. For longer times, the combined effect of disorder and interactions gives rise to inelastic scattering and to thermalization. A novel quantum kinetic equation accounting for both disorder and interactions is employed to study the dynamics. Thermalization turns out to be most effective close to the superfluid-Bose-glass critical point where nonlinearities become more and more important. The numerically obtained thermalization times are found to agree well with analytic estimates.

    Original languageEnglish (US)
    Article number010601
    JournalPhysical Review Letters
    Volume113
    Issue number1
    DOIs
    StatePublished - Jul 2 2014

    Fingerprint

    bosons
    disorders
    forward scattering
    kinetic equations
    critical point
    elastic scattering
    inelastic scattering
    nonlinearity
    interactions
    glass
    causes
    decay
    estimates

    ASJC Scopus subject areas

    • Physics and Astronomy(all)

    Cite this

    Quench dynamics of one-dimensional interacting bosons in a disordered potential : Elastic dephasing and critical speeding-up of thermalization. / Tavora, Marco; Rosch, Achim; Mitra, Aditi.

    In: Physical Review Letters, Vol. 113, No. 1, 010601, 02.07.2014.

    Research output: Contribution to journalArticle

    @article{a870bcccd6aa457190c5e4e84ff1968b,
    title = "Quench dynamics of one-dimensional interacting bosons in a disordered potential: Elastic dephasing and critical speeding-up of thermalization",
    abstract = "The dynamics of interacting bosons in one dimension following the sudden switching on of a weak disordered potential is investigated. On time scales before quasiparticles scatter (prethermalized regime), the dephasing from random elastic forward scattering causes all correlations to decay exponentially fast, but the system remains far from thermal equilibrium. For longer times, the combined effect of disorder and interactions gives rise to inelastic scattering and to thermalization. A novel quantum kinetic equation accounting for both disorder and interactions is employed to study the dynamics. Thermalization turns out to be most effective close to the superfluid-Bose-glass critical point where nonlinearities become more and more important. The numerically obtained thermalization times are found to agree well with analytic estimates.",
    author = "Marco Tavora and Achim Rosch and Aditi Mitra",
    year = "2014",
    month = "7",
    day = "2",
    doi = "10.1103/PhysRevLett.113.010601",
    language = "English (US)",
    volume = "113",
    journal = "Physical Review Letters",
    issn = "0031-9007",
    publisher = "American Physical Society",
    number = "1",

    }

    TY - JOUR

    T1 - Quench dynamics of one-dimensional interacting bosons in a disordered potential

    T2 - Elastic dephasing and critical speeding-up of thermalization

    AU - Tavora, Marco

    AU - Rosch, Achim

    AU - Mitra, Aditi

    PY - 2014/7/2

    Y1 - 2014/7/2

    N2 - The dynamics of interacting bosons in one dimension following the sudden switching on of a weak disordered potential is investigated. On time scales before quasiparticles scatter (prethermalized regime), the dephasing from random elastic forward scattering causes all correlations to decay exponentially fast, but the system remains far from thermal equilibrium. For longer times, the combined effect of disorder and interactions gives rise to inelastic scattering and to thermalization. A novel quantum kinetic equation accounting for both disorder and interactions is employed to study the dynamics. Thermalization turns out to be most effective close to the superfluid-Bose-glass critical point where nonlinearities become more and more important. The numerically obtained thermalization times are found to agree well with analytic estimates.

    AB - The dynamics of interacting bosons in one dimension following the sudden switching on of a weak disordered potential is investigated. On time scales before quasiparticles scatter (prethermalized regime), the dephasing from random elastic forward scattering causes all correlations to decay exponentially fast, but the system remains far from thermal equilibrium. For longer times, the combined effect of disorder and interactions gives rise to inelastic scattering and to thermalization. A novel quantum kinetic equation accounting for both disorder and interactions is employed to study the dynamics. Thermalization turns out to be most effective close to the superfluid-Bose-glass critical point where nonlinearities become more and more important. The numerically obtained thermalization times are found to agree well with analytic estimates.

    UR - http://www.scopus.com/inward/record.url?scp=84903844310&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84903844310&partnerID=8YFLogxK

    U2 - 10.1103/PhysRevLett.113.010601

    DO - 10.1103/PhysRevLett.113.010601

    M3 - Article

    VL - 113

    JO - Physical Review Letters

    JF - Physical Review Letters

    SN - 0031-9007

    IS - 1

    M1 - 010601

    ER -