Fermi liquid theory for the Anderson model out of equilibrium

Details Fermi liquid theory for the Anderson model out of equilibrium Fermi liquid theory for the Anderson model out of equilibrium

2001-06-03

arxiv.org/abs/cond-mat/0106030v1

Phys. Rev. B 64, 153305 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

8 pages, 1 figure

Scientific paper

10.1103/PhysRevB.64.153305

We study low-energy properties of the Anderson impurity under a finite bias voltage $V$ using the perturbation theory in $U$ of Yamada and Yosida in the nonequilibrium Keldysh diagrammatic formalism, and obtain the Ward identities for the derivative of the self-energy with respect to $V$. The self-energy is calculated exactly up to terms of order $\omega^2$, $T^2$ and $V^2$, and the coefficients are defined with respect to the equilibrium ground state. From these results, the nonlinear response of the current through the impurity has been deduced up to order $V^3$.

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