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arXiv cond-mat/0202425cond-mat.str-el
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非平衡Kondo模型中磁化强度的微扰展开

On the perturbative expansion of the magnetization in the out-of-equilibrium Kondo model

O. Parcollet, C. Hooley

摘要:

本文研究了非平衡态的两导Kondo模型,该模型被认为是一个处于Kondo区的量子点模型。我们重新审视点的磁化的微扰膨胀,并得出结论,即使在近藤相互作用的顺序为0,磁化不是由通常的平衡结果。我们使用Schwinger-Keldysh方法推导出描述两个引线之间的电压引起的稳态的Dyson方程,从而提出了计算系统的稳态性质的微扰展开的正确步骤。

英文摘要:

This paper is concerned with the out-of-equilibrium two-lead Kondo model, considered as a model of a quantum dot in the Kondo regime. We revisit the perturbative expansion of the dot's magnetization, and conclude that, even at order 0 in the Kondo interactions, the magnetization is not given by the usual equilibrium result. We use the Schwinger-Keldysh method to derive a Dyson equation describing the steady state induced by the voltage between the two leads, and thus present the correct procedure for calculating perturbative expansions of steady-state properties of the system.

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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