Quantum transport in a resonant tunnel junction coupled to a nanomechanical oscillator

TL;DR

This paper investigates quantum electron transport in a resonant tunnel junction coupled to a nanomechanical oscillator, revealing phonon-related satellite peaks and energy transfer dynamics at zero temperature.

Contribution

It introduces a Green's function approach to analyze electron transport and phonon effects in a strongly coupled electron-oscillator system.

Findings

Satellite peaks due to phonon creation become sharper with increased coupling

Energy transfer from electrons to the oscillator is characterized

Transport properties show distinct resonant and phonon sideband features

Abstract

We discuss the quantum transport of electrons through a resonant tunnel junction coupled to a nanomechanical oscillator at zero temperature. By using the Green's function technique we calculate the transport properties of electrons through a single dot strongly coupled to a single oscillator. We consider a finite chemical potential difference between the right and left leads. In addition to the main resonant peak of electrons on the dot, we find satellite peaks due to the creation of phonons. These satellite peaks become sharper and more significant with increasing coupling strength between the electrons and the oscillator. We also consider the energy transferred from the electrons to the oscillator.