Quantum Quench from a Thermal Initial State
Statistical Mechanics
2009-07-30 v2 Quantum Physics
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.
Cite
@article{arxiv.0903.0895,
title = {Quantum Quench from a Thermal Initial State},
author = {Spyros Sotiriadis and Pasquale Calabrese and John Cardy},
journal= {arXiv preprint arXiv:0903.0895},
year = {2009}
}
Comments
6 pages, 2 figures; short published version, added references, minor changes