Abstract
We study electron transport through double quantum dots (DQD) coupled to a cavity with a single photon mode. The DQD is connected to two electron reservoirs, and the total system is under an external perpendicular magnetic field. The DQD system exhibits a complex multi-level energy spectrum. By varying the photon energy, several anti-crossings between photon dressed electron states of the DQD-cavity system are found at low strength of the magnetic field. The anti-crossings are identified as multiple Rabi resonances arising from the photon exchange between these states. As the results, a dip in the current is seen caused by the multiple Rabi resonances. By increasing the strength of the external magnetic field, a dislocation of the current dip to a lower photon energy is found and the current dip can be diminished. The interplay of the strength of the magnetic field and the geometry of the states the DQD system can weaken the multiple Rabi resonances in which the exchange of photon between the anti-crossings is decreased. We can therefore confirm that the electron transport behavior in the DQD-cavity system can be controlled by manipulating the external magnetic field and the photon cavity parameters.
| Original language | English |
|---|---|
| Article number | 115405 |
| Journal | Physica E: Low-Dimensional Systems and Nanostructures |
| Volume | 144 |
| DOIs | |
| Publication status | Published - Oct 2022 |
Bibliographical note
Funding Information: This work was financially supported by the University of Sulaimani, Iraq and the Research center of Komar University of Science and Technology, Iraq . The computations were performed on the IHPC facilities provided by the University of Iceland. Publisher Copyright: © 2022 Elsevier B.V.Other keywords
- Cavity quantum electrodynamics
- Electron transport
- Photon-dressed electrons
- Quantum dots