Tunnel spectroscopy in ac-driven quantum dot nanoresonators

TL;DR

This paper investigates how an ac field influences electronic transport in a triple quantum dot device, revealing photon-vibrational interactions, current control via ac parameters, and the possibility of coherent tunneling suppression.

Contribution

It introduces a quantum mechanical analysis of ac-driven quantum dot nanoresonators, demonstrating control over tunneling and photon-vibrational effects in the system.

Findings

Photon and vibrational sidebands affect current characteristics.

Tuning ac parameters controls tunneling features.

Coherent destruction of tunneling can be achieved.

Abstract

Electronic transport in a triple quantum dot shuttle device in the presence of an ac field is analyzed within a fully quantum mechanical framework. A generalized density matrix formalism is used to describe the time evolution for electronic state occupations in a dissipative phonon bath. In the presence of an ac gate voltage, the electronic states are dressed by photons and the interplay between photon and vibrational sidebands produces current characteristics that obey selection rules. Varying the ac parameters allows to tune the tunneling current features. In particular, we show that coherent destruction of tunneling can be achieved in our device.