Fermi-liquid theory for the Anderson model out of equilibrium
Fermi-liquid theory for the Anderson model out of equilibrium
复制标题
安德森失衡模型的费米液体理论
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
A. Oguri
中科院分区：
文献类型：
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作者：
A. Oguri
利用Yamada和Yosida的U微扰理论，在非平衡Keldysh图解法中研究了有限偏压V下安德森杂质的低能性质.使用Ward恒等式精确计算自能，直到${ensuremath{omega}}^{2}、$ ${T}^{2}、$和${V}^{2}$阶项。这些系数是相对于平衡基态定义的，包含了U中微扰级数的所有贡献。从这些结果中，通过杂质的电流的非线性响应已被推导到${V}^{3}阶。
The low-energy properties of the Anderson impurity are studied under a finite bias voltage V using the perturbation theory in U of Yamada and Yosida in the nonequilibrium Keldysh diagrammatic formalism. The self-energy is calculated exactly up to terms of order ${ensuremath{omega}}^{2},$ ${T}^{2},$ and ${V}^{2}$ using Ward identities. The coefficients are defined with respect to the equilibrium ground state, and contain all contributions of the perturbation series in U. From these results, the nonlinear response of the current through the impurity has been deduced up to order ${V}^{3}.$