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Nonequilibrium Dyna...
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Strand, Hugo,1983-Department of Physics, University of Fribourg, Fribourg, Switzerland
(författare)
Nonequilibrium Dynamical Mean-Field Theory for Bosonic Lattice Models
- Artikel/kapitelEngelska2015
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American Physical Society,2015
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Nummerbeteckningar
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LIBRIS-ID:oai:DiVA.org:oru-89997
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https://urn.kb.se/resolve?urn=urn:nbn:se:oru:diva-89997URI
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https://doi.org/10.1103/PhysRevX.5.011038DOI
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Språk:engelska
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Sammanfattning på:engelska
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Ämneskategori:ref swepub-contenttype
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Ämneskategori:art swepub-publicationtype
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Funding Agency:FP7 ERC starting Grant 278023
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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.
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Eckstein, MartinMax Planck Research Department for Structural Dynamics, University of Hamburg-CFEL, Hamburg, Germany
(författare)
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Werner, PhilippDepartment of Physics, University of Fribourg, Fribourg, Switzerland
(författare)
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Department of Physics, University of Fribourg, Fribourg, SwitzerlandMax Planck Research Department for Structural Dynamics, University of Hamburg-CFEL, Hamburg, Germany
(creator_code:org_t)
Sammanhörande titlar
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Ingår i:Physical Review X: American Physical Society5:12160-3308
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