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

Journal Article · Fri May 04 00:00:00 EDT 2007 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.98.180601· OSTI ID:20951323

Kollath, Corinna ^[1]; Laeuchli, Andreas M ^[2]; Altman, Ehud ^[3]

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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)

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.

• OSTI ID: 20951323
• Journal Information: Physical Review Letters, Vol. 98, Issue 18; Other Information: DOI: 10.1103/PhysRevLett.98.180601; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CORRELATIONS
EVOLUTION
HUBBARD MODEL
INTERACTIONS
PHASE DIAGRAMS
STEADY-STATE CONDITIONS
SUPERFLUIDITY
THERMAL EQUILIBRIUM