Kondo effect in AC transport through Quantum dots

TL;DR

This paper develops a theoretical framework to analyze the Kondo effect in quantum dots under arbitrary intense AC potentials, emphasizing the importance of nonperturbative effects and charge conservation.

Contribution

It generalizes the Friedel-Langreth sum rule and proposes a consistent method to study time-dependent Anderson Hamiltonians with finite interactions.

Findings

AC potential significantly affects the quantum dot density of states.

Linear conductance is influenced by intradot interactions and nonperturbative effects.

The theory provides a comprehensive approach to AC-driven Kondo phenomena.

Abstract

A theory of the Kondo effect in quantum dots at zero temperature in the presence of arbitrary intense AC potentials is presented.We generalize the Friedel-Langreth sum rule to take care of charge conservation and propose a consistent procedure to study a time dependent Anderson Hamiltonian. The effect of the AC potential on both the quantum dot density of states and the linear conductance shows the importance of using a theory which describes intradot finite interaction and nonperturbative effects.