Thermoelectric inversion in a resonant quantum dot-cavity system in the steady-state regime
Abstract
The thermoelectric effect in a quantum dot system connected to two electron reservoirs in the presence of a photon cavity is investigated using a quantum master equation in the steady-state regime. If a quantized photon field is applied to the quantum dot system, an extra channel, the photon replica states, are formed leading to a generation of a photon-induced thermoelectric current. We observe that the photon replica states contribute to the transport irrespective of the direction of the thermal gradient. In the off-resonance regime, when the photon energy is smaller than the energy difference between the lowest states of the quantum dot system, a current plateau is seen for strong electron-photon coupling. In the resonant regime, an inversion of thermoelectric current emerges due to the Rabi-splitting. Therefore, the photon field can change both the magnitude and the sign of the thermoelectric current induced by the temperature gradient in the absence of a voltage bias between the leads.
Keywords
Cite
@article{arxiv.1812.05665,
title = {Thermoelectric inversion in a resonant quantum dot-cavity system in the steady-state regime},
author = {Nzar Rauf Abdullah and Chi-Shung Tang and Andrei Manolescu and Vidar Gudmundsson},
journal= {arXiv preprint arXiv:1812.05665},
year = {2019}
}
Comments
RevTeX, 8 pages with 9 included eps figures