Magnetic-field effects on photon-induced quantum transport in a single dot-cavity system

TL;DR

This paper investigates how a static magnetic field influences photon-induced electron transport in a quantum dot-cavity system, revealing the conditions under which photon fields enhance or suppress transport.

Contribution

It demonstrates the control of electron transport via magnetic and photon fields, highlighting the role of photon replica states in a quantum dot system.

Findings

Photon replica states control electron transport.

Photon energy dominance enhances transport.

Magnetic field modulates photon-induced transport.

Abstract

In this study, we show how a static magnetic field can control photon-induced electron transport through a quantum dot system coupled to a photon cavity. The quantum dot system is connected to two electron reservoirs and exposed to an external perpendicular static magnetic field. The propagation of electrons through the system is thus influenced by the static magnetic and the dynamic photon fields. It is observed that the photon cavity forms photon replica states controlling electron transport in the system. IF the photon field has more energy than the cyclotron energy, then the photon field is dominant in the electron transport. Consequently, the electron transport is enhanced due to activation of photon replica states. By contrast, the electron transport is suppressed in the system when the photon energy is smaller than the cyclotron energy.