摘要翻译:
利用非平衡动力平均场理论,给出了Falicov-Kimball模型相互作用参数突变后的精确解。对于均匀金属相和绝缘相之间不同的相互作用猝灭,体系在Hbar/带宽量级的时间尺度上弛豫到非热稳态,如果相互作用较大,则表现为崩溃和恢复,其周期约为H/。我们讨论了这种行为的原因,并用广义吉布斯系综给出了最终稳态的统计描述。
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英文标题:
《Nonthermal steady states after an interaction quench in the
Falicov-Kimball model》
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作者:
Martin Eckstein and Marcus Kollar
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最新提交年份:
2008
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分类信息:
一级分类:Physics 物理学
二级分类:Strongly Correlated Electrons 强关联电子
分类描述:Quantum magnetism, non-Fermi liquids, spin liquids, quantum criticality, charge density waves, metal-insulator transitions
量子磁学,非费米液体,自旋液体,量子临界性,电荷密度波,金属-绝缘体跃迁
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一级分类:Physics 物理学
二级分类:Statistical Mechanics 统计力学
分类描述:Phase transitions, thermodynamics, field theory, non-equilibrium phenomena, renormalization group and scaling, integrable models, turbulence
相变,热力学,场论,非平衡现象,重整化群和标度,可积模型,湍流
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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.
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PDF链接:
https://arxiv.org/pdf/707.2789