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arXiv 1610.04492cond-mat.str-elcond-mat.mes-hall
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相互作用猝灭后电荷和能量分配的非平衡效应

Non-equilibrium effects on charge and energy partitioning after an interaction quench

Alessio Calzona, Filippo Maria Gambetta, Matteo Carrega, Fabio Cavaliere, Maura Sassetti

摘要:

电荷和能量的分馏是相互作用的一维费米子系统最有趣的特征之一。在这项工作中,我们确定如何修改这些现象中存在的相互作用淬火。电荷和能量注入到系统突然淬火后,通过隧穿过程与非相互作用的一维探针。在这里,我们证明了该系统解决到一个稳定的状态,其中的电荷分馏比是不受预淬火参数。相反,由于淬火后的非平衡谱函数,能量分配比被强烈修改,达到大于1的值。这是淬火过程的非平衡动力学的一个独特特征,并且与非淬火情况形成鲜明对比,在非淬火情况下,比率以1为界。

英文摘要:

Charge and energy fractionalization are among the most intriguing features of interacting onedimensional fermion systems. In this work we determine how these phenomena are modified in the presence of an interaction quench. Charge and energy are injected into the system suddenly after the quench, by means of tunneling processes with a non-interacting one-dimensional probe. Here, we demonstrate that the system settles to a steady state in which the charge fractionalization ratio is unaffected by the pre-quenched parameters. On the contrary, due to the post-quench nonequilibrium spectral function, the energy partitioning ratio is strongly modified, reaching values larger than one. This is a peculiar feature of the non-equilibrium dynamics of the quench process and it is in sharp contrast with the non-quenched case, where the ratio is bounded by one.

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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