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  • Strand, Hugo, 1983-, et al. (author)
  • Nonequilibrium Dynamical Mean-Field Theory for Bosonic Lattice Models
  • 2015
  • In: Physical Review X. - : American Physical Society. - 2160-3308. ; 5:1
  • Journal article (peer-reviewed)abstract
    • We develop the nonequilibrium extension of bosonic dynamical mean-field theory and a Nambu real-time strong-coupling perturbative impurity solver. In contrast to Gutzwiller mean-field theory and strong-coupling perturbative approaches, nonequilibrium bosonic dynamical mean-field theory captures not only dynamical transitions but also damping and thermalization effects at finite temperature. We apply the formalism to quenches in the Bose-Hubbard model, starting from both the normal and the Bose-condensed phases. Depending on the parameter regime, one observes qualitatively different dynamical properties, such as rapid thermalization, trapping in metastable superfluid or normal states, as well as long-lived or strongly damped amplitude oscillations. We summarize our results in nonequilibrium “phase diagrams” that map out the different dynamical regimes.
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Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Strand, Hugo, 1983 (1)
Eckstein, Martin (1)
Werner, Philipp (1)
University
Örebro University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Natural sciences (1)
Year
2015 (1)

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