Nonequilibrium Steady State Generated by a Moving Defect: The Supersonic Threshold.

Nonequilibrium Steady State Generated by a Moving Defect: The Supersonic Threshold.
复制标题

由移动缺陷产生的非平衡稳态:超音速阈值。

DOI:
10.1103/physrevlett.120.060602
复制
发表时间:
2018
影响因子:
8.6
通讯作者:
Bastianello A
Bastianello A
中科院分区:
物理与天体物理1区
文献类型:
--
作者:
Bastianello A

文献摘要

参考文献

被引文献

相似文献

我们考虑了一维晶格上存在匀速运动缺陷的自由费米子系统的动力学。缺陷具有局部化学势随时间变化的形式,并在长时间内诱发非平衡稳态(NESS),该稳态在缺陷周围扩散。我们提出了一个一般的公式,允许在一个静态势的散射问题上重铸时间相关的协议。我们得到了NESS的完整表征。特别地,我们展示了缺陷速度的强烈依赖性,当缺陷速度超过声速时存在一个尖锐的阈值。超过这个值,就不会产生NESS,并且值得注意的是,缺陷在不显著干扰系统的情况下传播。我们提出了以任意速度运动的类a缺陷的精确解,并开发了一个为光滑缺陷提供精确结果的半经典近似。
We consider the dynamics of a system of free fermions on a 1D lattice in the presence of a defect moving at constant velocity. The defect has the form of a localized time-dependent variation of the chemical potential and induces at long times a nonequilibrium steady state (NESS), which spreads around the defect. We present a general formulation that allows recasting the time-dependent protocol in a scattering problem on a static potential. We obtain a complete characterization of the NESS. In particular, we show a strong dependence on the defect velocity and the existence of a sharp threshold when such velocity exceeds the speed of sound. Beyond this value, the NESS is not produced and, remarkably, the defect travels without significantly perturbing the system. We present an exact solution for a-like defect traveling with an arbitrary velocity and we develop a semiclassical approximation that provides accurate results for smooth defects.
DOI: --
发表时间: 2002
期刊: Physical review. E, Statistical, nonlinear, and soft matter physics
影响因子: --
作者:
Y. Ogata
通讯作者: Y. Ogata
非均匀量子淬灭
DOI: --
发表时间: 2008
期刊:
影响因子: --
作者:
S. Sotiriadis;J. Cardy
通讯作者: J. Cardy
关于量子刘维尔方程
DOI: --
发表时间: 1985
期刊:
影响因子: --
作者:
F. Narcowich
通讯作者: F. Narcowich
量子淬灭后可积量子场论中局部场的无限时间平均值。
DOI: --
发表时间: 2013
影响因子: 8.6
作者:
G. Mussardo
通讯作者: G. Mussardo
DOI: 10.1103/physrevlett.119.220604
发表时间: 2017-11-30
影响因子: 8.6
作者:
Bulchandani, Vir B.;Vasseur, Romain;Moore, Joel E.
通讯作者: Moore, Joel E.