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Title: Quench Dynamics and Nonequilibrium Phase Diagram of the Bose-Hubbard Model

Abstract

We investigate the time evolution of correlations in the Bose-Hubbard model following a quench from the superfluid to the Mott insulator. For large values of the final interaction strength the system approaches a distinctly nonequilibrium steady state that bears strong memory of the initial conditions. In contrast, when the final interaction strength is comparable to the hopping, the correlations are rather well approximated by those at thermal equilibrium. The existence of two distinct nonequilibrium regimes is surprising given the nonintegrability of the Bose-Hubbard model. We relate this phenomenon to the role of quasiparticle interactions in the Mott insulator.

Authors:
 [1];  [2];  [3]
  1. Universite de Geneve, 24 Quai Ernest-Ansermet, CH-1211 Geneva (Switzerland)
  2. Institut Romand de Recherche Numerique en Physique des Materiaux (IRRMA), CH-1015 Lausanne (Switzerland)
  3. Department of Condensed Matter Physics, Weizmann Institute of Science, Rehovot 76100 (Israel)
Publication Date:
OSTI Identifier:
20951323
Resource Type:
Journal Article
Resource Relation:
Journal Name: Physical Review Letters; Journal Volume: 98; Journal Issue: 18; Other Information: DOI: 10.1103/PhysRevLett.98.180601; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; CORRELATIONS; EVOLUTION; HUBBARD MODEL; INTERACTIONS; PHASE DIAGRAMS; STEADY-STATE CONDITIONS; SUPERFLUIDITY; THERMAL EQUILIBRIUM

Citation Formats

Kollath, Corinna, Laeuchli, Andreas M., and Altman, Ehud. Quench Dynamics and Nonequilibrium Phase Diagram of the Bose-Hubbard Model. United States: N. p., 2007. Web. doi:10.1103/PHYSREVLETT.98.180601.
Kollath, Corinna, Laeuchli, Andreas M., & Altman, Ehud. Quench Dynamics and Nonequilibrium Phase Diagram of the Bose-Hubbard Model. United States. doi:10.1103/PHYSREVLETT.98.180601.
Kollath, Corinna, Laeuchli, Andreas M., and Altman, Ehud. Fri . "Quench Dynamics and Nonequilibrium Phase Diagram of the Bose-Hubbard Model". United States. doi:10.1103/PHYSREVLETT.98.180601.
@article{osti_20951323,
title = {Quench Dynamics and Nonequilibrium Phase Diagram of the Bose-Hubbard Model},
author = {Kollath, Corinna and Laeuchli, Andreas M. and Altman, Ehud},
abstractNote = {We investigate the time evolution of correlations in the Bose-Hubbard model following a quench from the superfluid to the Mott insulator. For large values of the final interaction strength the system approaches a distinctly nonequilibrium steady state that bears strong memory of the initial conditions. In contrast, when the final interaction strength is comparable to the hopping, the correlations are rather well approximated by those at thermal equilibrium. The existence of two distinct nonequilibrium regimes is surprising given the nonintegrability of the Bose-Hubbard model. We relate this phenomenon to the role of quasiparticle interactions in the Mott insulator.},
doi = {10.1103/PHYSREVLETT.98.180601},
journal = {Physical Review Letters},
number = 18,
volume = 98,
place = {United States},
year = {Fri May 04 00:00:00 EDT 2007},
month = {Fri May 04 00:00:00 EDT 2007}
}
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