Renormalization in periodically driven quantum dots

TL;DR

This paper investigates how periodic driving in interacting quantum dots causes strong, power-law renormalization effects influenced by electron correlations, enabling potential applications as a quantum pump.

Contribution

It introduces a new renormalization group method for analyzing periodically driven quantum dots and reveals how interactions modify driving amplitudes in a non-adiabatic regime.

Findings

Renormalization effects follow a power-law behavior.

Interactions can enhance or suppress driving amplitudes.

Quantum dots can function as non-Markovian quantum pumps.

Abstract

We report on strong renormalization encountered in periodically driven interacting quantum dots in the non-adiabatic regime. Correlations between lead and dot electrons enhance or suppress the amplitude of driving depending on the sign of the interaction. Employing a newly developed flexible renormalization group based approach for periodic driving to an interacting resonant level we show analytically that the magnitude of this effect follows a power law. Our setup can act as a non-Markovian, single-parameter quantum pump.