Spontaneous emission and thermalization of cold bosons in optical lattices

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Schachenmayer, J. and Pollet, L. and Troyer, M. and Daley, A. J. (2014) Spontaneous emission and thermalization of cold bosons in optical lattices. Physical Review A, 89 (1). 011601. ISSN 1050-2947 (https://doi.org/10.1103/PhysRevA.89.011601)

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Abstract

We study the thermalization of excitations generated by spontaneous emission events for cold bosons in an optical lattice. Computing the dynamics described by the many-body master equation, we characterize equilibration time scales in different parameter regimes. For simple observables, we find regimes in which the system relaxes rapidly to values in agreement with a thermal distribution, and others where thermalization does not occur on typical experimental time scales. Because spontaneous emissions lead effectively to a local quantum quench, this behavior is strongly dependent on the low-energy spectrum of the Hamiltonian, and undergoes a qualitative change at the Mott insulator-superfluid transition point. These results have important implications for the understanding of thermalization after localized quenches in isolated quantum gases, as well as the characterization of heating in experiments.

ORCID iDs

Schachenmayer, J., Pollet, L., Troyer, M. and Daley, A. J. ORCID logoORCID: https://orcid.org/0000-0001-9005-7761;
  • Item type:Article
    ID code:51149
    Dates:
    Date
    Event
    10 January 2014
    Published
    21 December 2013
    Accepted
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:19 Jan 2015 11:02
    Last modified:11 Nov 2024 10:55
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/51149
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