Interaction effect on reservoir-parameter-driven adiabatic charge pumping via a single-level quantum dot system

TL;DR

This paper develops a theoretical framework for adiabatic charge pumping in a quantum dot system driven by reservoir parameters, accounting for strong coupling and Coulomb interactions, including effects like the Kondo phenomenon.

Contribution

It introduces a formulation that describes adiabatic charge pumping with arbitrary coupling strength and Coulomb interaction, applicable at low temperatures where the Kondo effect is relevant.

Findings

Charge pumping is expressed via Berry connection.

Coulomb interaction influences the pumped charge.

The approach applies to low-temperature regimes with strong correlations.

Abstract

We formulate adiabatic charge pumping via a single-level quantum dot (QD) induced by reser- voir parameter driving, i.e., temperature and electrochemical potential driving. Our formulation describes arbitrary strength of dot-reservoir coupling and Coulomb interaction in the QD, and is applicable to the low-temperature regime, where the Kondo effect becomes important. The adia- batic charge pumping is expressed by the Berry connection and is related to delayed response of the QD. We calculate the pumped charge by the renormalized perturbation theory, and discuss how the Coulomb interaction affects the charge pumping.