Photon assisted long-range tunneling

TL;DR

This paper investigates photon-assisted long-range tunneling in a triple quantum dot system driven by an AC field, revealing how the field influences transport via virtual processes and level hybridization.

Contribution

It introduces an effective model for photoassisted cotunneling that captures virtual processes and the impact of AC field parameters on long-range quantum dot transport.

Findings

Transport occurs at n-photon resonances between edge dots.

AC field renormalizes inter-dot hopping and hybridization.

Current exhibits non-trivial dependence on frequency and intensity.

Abstract

We analyze long-range transport through an ac driven triple quantum dot with one single electron. An effective model is proposed for the analysis of photoassisted cotunnel in order to account for the virtual processes which dominate the long-range transport, which takes place at n-photon resonances between the edge quantum dots. The AC field renormalizes the inter dot hopping, modifying the levels hybridization. It results in a non trivial behavior of the current with the frequency and intensity of the external ac field.