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Quantum quench from a thermal initial state

Abstract:
We consider a quantum quench in a system of free bosons, starting from a thermal initial state. As in the case where the system is initially in the ground state, any finite subsystem eventually reaches a stationary thermal state with a momentum-dependent effective temperature. We find that this can, in some cases, even be lower than the initial temperature. We also study lattice effects and discuss more general types of quenches. Copyright © 2009 EPLA.Association.

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Publisher copy:
10.1209/0295-5075/87/20002

Authors


Journal:
EPL
Volume:
87
Issue:
2
Publication date:
2009-01-01
DOI:
EISSN:
1286-4854
ISSN:
0295-5075
URN:
uuid:8ddc81e0-e2d3-47e9-b903-85d085032747
Source identifiers:
240756
Local pid:
pubs:240756
Language:
English

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