Photon-assisted electron transport through a three-terminal quantum dot system with nonresonant tunneling channels

TL;DR

This paper investigates electron transport in a three-terminal quantum dot system influenced by microwave fields and nonresonant tunneling channels, providing analytical formulas and analyzing dynamic responses to external modulations.

Contribution

It introduces a comprehensive analytical framework for electron transport in a multi-terminal quantum dot with nonresonant tunneling and external microwave fields.

Findings

Derived analytical formulas for time-averaged currents and conductance.

Analyzed the system's response to pulse modulation and connection changes.

Explored effects of nonresonant tunneling channels on transport properties.

Abstract

We have studied the electron transport through a quantum dot coupled to three leads in the presence of external microwave fields supplied to different parts of the considered mesoscopic system. Additionally, we introduced a possible nonresonant tunneling channels between leads. The quantum dot charge and currents were determined in terms of the appropriate evolution operator matrix elements and under the wide band limit the analytical formulas for time-averaged currents and differential conductance were obtained. We have also examined the response of the considered system on the rectangular-pulse modulation imposed on different quantum dot-leads barriers as well as the time-dependence of currents flowing in response to suddenly removed (or included) connection of a quantum dot with one of the leads.