Non-equilibrium dynamics of Andreev states in the Kondo regime
A. Levy Yeyati, A. Martin-Rodero, E. Vecino
TL;DR
This paper investigates the non-equilibrium behavior of Andreev states in a quantum dot within the Kondo regime, revealing how subgap states influence transport properties under bias and predicting interference effects.
Contribution
It introduces a detailed analysis of non-equilibrium dynamics of Andreev states in the Kondo regime, linking quasiparticle current to subgap state behavior and predicting new interference phenomena.
Findings
Low bias current suppression correlates with decreasing Kondo temperature.
Predicted interference effects from Landau-Zener transitions between Andreev states.
Transport properties are governed by non-equilibrium dynamics of subgap states.
Abstract
The transport properties of a quantum dot coupled to superconducting leads are analyzed. It is shown that the quasiparticle current in the Kondo regime is determined by the non-equilibrium dynamics of subgap states (Andreev states) under an applied voltage. The current at low bias is suppressed exponentially for decreasing Kondo temperature in agreement with recent experiments. We also predict novel interference effects due to multiple Landau-Zener transitions between Andreev states.
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