Quantum quench from a thermal initial state

被引：109

作者：

Sotiriadis, S. ^{[1
]}

Calabrese, P. ^{[2
]}

Cardy, J. ^{[1
,3
]}

机构：

[1] Univ Oxford, Rudolf Peierls Ctr Theoret Phys, Oxford OX1 3NP, England

[2] Univ Pisa, Dipartimento Fis Enrico Fermi, I-56127 Pisa, Italy

[3] Univ Oxford All Souls Coll, Oxford OX1 4AL, England

来源：

EPL | 2009年 / 87卷 / 02期

基金：

英国工程与自然科学研究理事会;

关键词：

ENTANGLEMENT; RELAXATION;

D O I：

10.1209/0295-5075/87/20002

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 (C) EPLA, 2009

引用

页数：6

共 45 条

[1] Relaxation of Antiferromagnetic Order in Spin-1/2 Chains Following a Quantum Quench [J].

Barmettler, Peter ;

Punk, Matthias ;

Gritsev, Vladimir ;

Demler, Eugene ;

Altman, Ehud .

PHYSICAL REVIEW LETTERS, 2009, 102 (13)

[2] STATISTICAL MECHANICS OF XY MODEL .1 [J].

BAROUCH, E ;

MCCOY, BM ;

DRESDEN, M .

PHYSICAL REVIEW A-GENERAL PHYSICS, 1970, 2 (03) :1075-+

[3] Dephasing and the steady state in quantum many-particle systems [J].

Barthel, T. ;

Schollwoeck, U. .

PHYSICAL REVIEW LETTERS, 2008, 100 (10)

[4] Time dependence of correlation functions following a quantum quench [J].

Calabrese, P ;

Cardy, J .

PHYSICAL REVIEW LETTERS, 2006, 96 (13)

[5] Evolution of entanglement entropy in one-dimensional systems [J].

Calabrese, P ;

Cardy, J .

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2005, :15-38

[6] On the definition of a unique effective temperature for non-equilibrium critical systems [J].

Calabrese, P ;

Gambassi, A .

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2004,

[7] Ageing properties of critical systems [J].

Calabrese, P ;

Gambassi, A .

JOURNAL OF PHYSICS A-MATHEMATICAL AND GENERAL, 2005, 38 (18) :R133-R193

[8] Quantum quenches in extended systems [J].

Calabrese, Pasquale ;

Cardy, John .

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2007,

[9] Entanglement and correlation functions following a local quench: a conformal field theory approach [J].

Calabrese, Pasquale ;

Cardy, John .

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2007,

[10] Time evolution of one-dimensional gapless models from a domain wall initial state: stochastic Loewner evolution continued? [J].

Calabrese, Pasquale ;

Hagendorf, Christian ;

Le Doussal, Pierre .

JOURNAL OF STATISTICAL MECHANICS-THEORY AND EXPERIMENT, 2008,

← 1 2 3 4 5 →