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Nonequilibrium Dyna...
Nonequilibrium Dynamical Mean-Field Theory for Bosonic Lattice Models
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- Strand, Hugo, 1983- (author)
- Department of Physics, University of Fribourg, Fribourg, Switzerland
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- Eckstein, Martin (author)
- Max Planck Research Department for Structural Dynamics, University of Hamburg-CFEL, Hamburg, Germany
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- Werner, Philipp (author)
- Department of Physics, University of Fribourg, Fribourg, Switzerland
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(creator_code:org_t)
- American Physical Society, 2015
- 2015
- English.
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In: Physical Review X. - : American Physical Society. - 2160-3308. ; 5:1
- Related links:
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https://doi.org/10.1...
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https://urn.kb.se/re...
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Abstract
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- 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.
Subject headings
- NATURVETENSKAP -- Fysik -- Den kondenserade materiens fysik (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Condensed Matter Physics (hsv//eng)
Publication and Content Type
- ref (subject category)
- art (subject category)
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