Time-dependent generalized Gibbs ensembles in open quantum systems
Time-dependent generalized Gibbs ensembles in open quantum systems
复制标题
开放量子系统中的时间相关广义吉布斯系综
DOI:
10.1103/physrevb.97.165138
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发表时间:
2018
影响因子:
3.7
通讯作者:
A. Rosch
中科院分区:
文献类型:
--
作者:
F. Lange;Z. Lenarvcivc;A. Rosch
Generalized Gibbs ensembles have been used as powerful tools to describe the steady state of integrable many-particle quantum systems after a sudden change of the Hamiltonian. Here we demonstrate numerically, that they can be used for a much broader class of problems. We consider integrable systems in the presence of weak perturbations which both break integrability and drive the system to a state far from equilibrium. Under these conditions, we show that the steady state and the time-evolution on long time-scales can be accurately described by a (truncated) generalized Gibbs ensemble with time-dependent Lagrange parameters, determined from simple rate equations. We compare the numerically exact time evolutions of density matrices for small systems with a theory based on block-diagonal density matrices (diagonal ensemble) and a time-dependent generalized Gibbs ensemble containing only small number of approximately conserved quantities, using the one-dimensional Heisenberg model with perturbations described by Lindblad operators as an example.
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影响因子:
8.6
作者:
Bertini, Bruno;Essler, Fabian H. L.;Robinson, Neil J.
通讯作者:
Robinson, Neil J.
影响因子:
8.6
作者:
Bulchandani, Vir B.;Vasseur, Romain;Moore, Joel E.
通讯作者:
Moore, Joel E.
影响因子:
56.9
作者:
Langen, Tim;Erne, Sebastian;Schmiedmayer, Joerg
通讯作者:
Schmiedmayer, Joerg
DOI:
10.1088/1742-5468/2015/07/p07012
发表时间:
2015
期刊:
Theory and Experiment
影响因子:
--
作者:
Bertini B
通讯作者:
Bertini B
影响因子:
8.6
作者:
Caux, Jean-Sebastien;Essler, Fabian H. L.
通讯作者:
Essler, Fabian H. L.