Single photon controlled steady state electron transport through a resonance DQD-Cavity system in a strong coupling regime

TL;DR

This paper presents a theoretical study of steady-state electron transport in a double quantum dot coupled to a cavity photon field, analyzing effects of resonance, coupling strength, and cavity-environment interactions on electron occupation and current.

Contribution

It introduces a comprehensive theoretical model for electron transport in DQD-cavity systems considering both resonance and off-resonance regimes with varying coupling strengths.

Findings

Photon exchanges reflect multiple Rabi-resonances in strong coupling.

Electron occupation and current increase with cavity-environment coupling.

Off-resonance, photon exchange diminishes but electron transport remains prominent at high coupling.

Abstract

We perform theoretical calculations to study steady-state electron transport in a double quantum dot, DQD, coupled to a quantized cavity photon field both in resonance and off-resonance regimes considering weak and strong coupling. In the resonant strong coupling regime, photon exchanges between the energy states of the DQD and the cavity are found reflecting multiple Rabi-resonances. The electron occupation of the states and the transport current can be smoothly increased by tuning the cavity-environment coupling strength. Making the system off-resonant, but still in the strong coupling regime, the photon exchange is diminished and the electron occupation of the system and the transport current through it are prominent for high cavity-environment coupling strength. In the weak coupling regime between the DQD and the cavity, the system has almost the same response in the resonant and the off-resonant regimes at high values of the cavity-environment coupling strength.