Short-time universal scaling in an isolated quantum system after a quench

被引：72

作者：

Chiocchetta, Alessio ^{[1
,2
]}

Tavora, Marco ^{[3
]}

Gambassi, Andrea ^{[1
,2
]}

Mitra, Aditi ^{[3
]}

机构：

[1] ISISSA Int Sch Adv Studies, I-34136 Trieste, Italy

[2] Ist Nazl Fis Nucl, I-34136 Trieste, Italy

[3] New York Univ, Dept Phys, New York, NY 10003 USA

来源：

PHYSICAL REVIEW B | 2015年 / 91卷 / 22期

基金：

美国国家科学基金会;

关键词：

NONEQUILIBRIUM DYNAMICS; STATISTICAL-MECHANICS; MOTT INSULATOR; THERMALIZATION; ATOMS; GAS; RELAXATION; TRANSITION; SUPERFLUID; MAGNETISM;

D O I：

10.1103/PhysRevB.91.220302

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Renormalization-group methods provide a viable approach for investigating the emergent collective behavior of classical and quantum statistical systems in both equilibrium and nonequilibrium conditions. Within this approach we investigate here the dynamics of an isolated quantum system represented by a scalar phi(4) theory after a global quench of the potential close to a dynamical critical point. We demonstrate that, within a prethermal regime, the time dependence of the relevant correlations is characterized by a short-time universal exponent, which we calculate at the lowest order in a dimensional expansion.

引用

页数：5

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