Spontaneous emission and thermalization of cold bosons in optical lattices
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: https://orcid.org/0000-0001-9005-7761;-
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Item type: Article ID code: 51149 Dates: DateEvent10 January 2014Published21 December 2013AcceptedSubjects: Science > Physics Department: Faculty of Science > Physics Depositing user: Pure Administrator Date deposited: 19 Jan 2015 11:02 Last modified: 09 Oct 2024 00:23 Related URLs: URI: https://strathprints.strath.ac.uk/id/eprint/51149