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arXiv 0707.2789cond-mat.str-elcond-mat.stat-mech
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Falicov-Kimball模型中相互作用猝灭后的非热定态

Nonthermal steady states after an interaction quench in the Falicov-Kimball model

Martin Eckstein, Marcus Kollar

摘要:

利用非平衡动力学平均场论,给出了Falicov-Kimball模型在相互作用参数突变后的精确解。对于不同的相互作用淬火均匀的金属和绝缘相之间的系统松弛到一个非热稳定状态的时间尺度上的顺序hbar/带宽,显示崩溃和复兴的近似周期的h/相互作用,如果相互作用是大的。我们讨论了这种行为的原因,并提供了一个统计描述的最终稳定状态的广义吉布斯系综。

英文摘要:

We present the exact solution of the Falicov-Kimball model after a sudden change of its interaction parameter using non-equilibrium dynamical mean-field theory. For different interaction quenches between the homogeneous metallic and insulating phases the system relaxes to a non-thermal steady state on time scales on the order of hbar/bandwidth, showing collapse and revival with an approximate period of h/interaction if the interaction is large. We discuss the reasons for this behavior and provide a statistical description of the final steady state by means of generalized Gibbs ensembles.

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。

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