Surface Acoustic Wave induced Transport in a Double Quantum Dot

TL;DR

This paper investigates how surface acoustic waves induce non-adiabatic electron transport in a double quantum dot, revealing phonon-assisted tunneling and non-equilibrium states, advancing understanding of electron-phonon interactions.

Contribution

It demonstrates phonon-assisted transport and non-equilibrium dynamics in a double quantum dot driven by surface acoustic waves, a novel experimental observation.

Findings

Observation of single and multiple phonon absorption/emission

Detection of sequential phonon-assisted tunneling

Excitation of the double dot into non-equilibrium states

Abstract

We report on non-adiabatic transport through a double quantum dot under irradiation of surface acoustic waves generated on-chip. At low excitation powers, absorption and emission of single and multiple phonons is observed. At higher power, sequential phonon assisted tunneling processes excite the double dot in a highly non-equilibrium state. The present system is attractive for studying electron-phonon interaction with piezoelectric coupling.