Thermalization after an Interaction Quench in the Hubbard Model

被引：374

作者：

Eckstein, Martin ^{[1
]}

Kollar, Marcus ^{[1
]}

Werner, Philipp ^{[2
]}

机构：

[1] Univ Augsburg, Inst Phys, Ctr Elect Correlat & Magnetism, D-86135 Augsburg, Germany

[2] ETH, CH-8093 Zurich, Switzerland

来源：

PHYSICAL REVIEW LETTERS | 2009年 / 103卷 / 05期

基金：

瑞士国家科学基金会;

关键词：

INSULATOR; TRANSITION; FERMIONS; FIELD;

D O I：

10.1103/PhysRevLett.103.056403

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We use nonequilibrium dynamical mean-field theory to study the time evolution of the fermionic Hubbard model after an interaction quench. Both in the weak-coupling and in the strong-coupling regime the system is trapped in quasistationary states on intermediate time scales. These two regimes are separated by a sharp crossover at U-c(dyn) = 0: 8 in units of the bandwidth, where fast thermalization occurs. Our results indicate a dynamical phase transition which should be observable in experiments on trapped fermionic atoms.

引用

页数：4

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