2018/06/24 by Nzar Rauf Abdullah, Vidar Gudmundsson, Viðar Guðmundsson
Computer Science · Physics and Astronomy · #Advanced Thermodynamics and Statistical Mechanics #Atomic physics #Cavity quantum electrodynamics #Condensed matter physics #Coupling constant #Electron #Molecular physics #Open quantum system #Photon #Physics #Quantum #Quantum Information and Cryptography #Quantum and electron transport phenomena #Quantum mechanics #Spins #cond-mat.mes-hall
paper · pdf · doi:10.1016/j.physe.2018.07.036
published as Physica E 104, 223 (2018) · RevTeX, 7 pages with 8 included eps figures
arxiv created 2018/06/24 · openalex publication_date 2018/08/01 · arxiv updated 2019/05/22 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
Cavity-coupled nanoelectric devices hold great promise for quantum technology based on coupling between electron-spins and photons. In this study, we approach the description of these effects through the modeling of a nanodevice using a quantum master equation. We assume a quantum ring is coupled to two external leads with different temperatures and embedded in a cavity with a single photon mode. Thermospin transport of the ring-cavity system is investigated by tuning the Rashba coupling constant and the electron-photon coupling strength. In the absence of the cavity, the temperature gradient of the leads causes a generation of a thermospin transport in the ring system. It is observed that the induced spin polarization has a maximum value at the critical value of the Rashba coupling constant corresponding to the Aharonov-Casher destructive interference, where the thermospin current is efficiently suppressed. Embedded in a photon cavity with the photon energy close to a resonance with the energy spacing between lowest states of the quantum ring, a Rabi splitting in the energy spectrum is observed. Furthermore, photon replica states are formed leading to a reduction in the thermospin current.