Quantum relaxation after a quench in systems with boundaries.
Quantum relaxation after a quench in systems with boundaries.
复制标题
有边界系统淬灭后的量子弛豫。
DOI：
10.1103/physrevlett.106.035701
复制
发表时间：
2010
影响因子：
8.6
通讯作者：
H. Rieger
中科院分区：
文献类型：
--
作者：
F. Iglói;H. Rieger
研究了有限大开量子Ising链在猝灭后的磁化强度分布m（l）（t）随时间的变化.我们观察到一个周期性的变化，其中开始与一个指数下降的周期的局部磁化到达一个准静态制度，这是由一个指数快速重建期。在近表面站点观察到的非热行为转向散装网站的热行为。除了标准的时间和长度尺度的非标准的时间尺度被确定在重建期间。
We study the time dependence of the magnetization profile, m(l)(t), of a large finite open quantum Ising chain after a quench. We observe a cyclic variation, in which starting with an exponentially decreasing period the local magnetization arrives to a quasistationary regime, which is followed by an exponentially fast reconstruction period. The nonthermal behavior observed at near-surface sites turns over to thermal behavior for bulk sites. In addition to the standard time and length scales a nonstandard time scale is identified in the reconstruction period.