arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1105.3176cond-mat.stat-mech
收藏

量子Ising链猝灭后广义Gibbs系综的适用性

Applicability of the generalized Gibbs ensemble after a quench in the quantum Ising chain

Tommaso Caneva, Elena Canovi, Davide Rossini, Giuseppe E. Santoro, Alessandro Silva

摘要:

研究了一维量子伊辛模型在横向磁场突然猝灭后的非平衡动力学。虽然对于一个平移不变系统的统计描述的渐近序参量相关淬火后,可以执行的广义吉布斯系综,我们表明,打破平移不变性,例如,通过扰动边界条件,破坏了它的有效性。这种效果,这当然消失在热力学极限,被证明是非常重要的存在的障碍。

英文摘要:

We investigate the out-of-equilibrium dynamics of the one-dimensional quantum Ising model after a sudden quench of the transverse magnetic field. While for a translationally invariant system the statistical description of the asymptotic order parameter correlations after the quench can be performed in terms of the generalized Gibbs ensemble, we show that a breaking of translational invariance, e.g., by perturbing the boundary conditions, disrupts its validity. This effect, which of course vanishes in the thermodynamic limit, is shown to be very important in the presence of disorder.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑