Issue |
EPL
Volume 87, Number 2, July 2009
|
|
---|---|---|
Article Number | 20002 | |
Number of page(s) | 6 | |
Section | General | |
DOI | https://doi.org/10.1209/0295-5075/87/20002 | |
Published online | 30 July 2009 |
Quantum quench from a thermal initial state
1
Oxford University, Rudolf Peierls Centre for Theoretical Physics - 1 Keble Road, Oxford OX1 3NP, UK, EU
2
Dipartimento di Fisica Enrico Fermi, Università di Pisa - Largo Bruno Pontecorvo 3, 56127 Pisa, Italy, EU
3
All Souls College - High Street, Oxford OX1 4AL, UK, EU
Received:
18
March
2009
Accepted:
6
July
2009
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.
PACS: 03.75.Kk – Dynamic properties of condensates; collective and hydrodynamic excitations, superfluid flow / 05.30.-d – Quantum statistical mechanics
© EPLA, 2009
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.