Anderson Model Out of Equilibrium: Time-Dependent Perturbations

Anderson model out of equilibrium: Time-dependent perturbations.

The influence of high-frequency fields on quantum transport through a quantum dot is studied in the low-temperature regime. We generalize the non crossing approximation for the infinite-U Anderson model to the timedependent case. The dc spectral density shows asymmetric Kondo side peaks due to photon-assisted resonant tunneling. As a consequence we predict an electron-photon pump at zero bias w...

Anderson model out of equilibrium: Noncrossing-approximation approach to transport through a quantum dot.

The infinite-U Anderson model is applied to transport through a quantum dot. The current and density of states are obtained via the non-crossing approximation for two spin-degenerate levels weakly coupled to two leads. At low temperatures, the Kondo peak in the equilibrium density of states strongly enhances the linear-response conductance. Application of a finite voltage bias reduces the condu...

un 2 00 1 Fermi liquid theory for the Anderson model out of equilibrium

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 ω, T 2 and V 2 using Ward identities. The coefficients are defined with respect to the equilibrium ground state, and contain all contri...

Low-temperature transport through a quantum dot: The Anderson model out of equilibrium.

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