Rashba cavity QED: a route towards the superradiant quantum phase transition
Strongly Correlated Electrons
2019-11-20 v1 Mesoscale and Nanoscale Physics
Abstract
We develop a theory of cavity quantum electrodynamics for a 2D electron gas in the presence of Rashba spin-orbit coupling and perpendicular static magnetic field, coupled to spatially nonuniform multimode quantum cavity photon fields. We demonstrate that the lowest polaritonic frequency of the full Hamiltonian can vanish for realistic parameters, achieving the Dicke superradiant quantum phase transition. This singular behaviour originates from soft spin-flip transitions possessing a non-vanishing dipole moment at non-zero wave vectors and can be viewed as a magnetostatic instability.
Keywords
Cite
@article{arxiv.1907.02938,
title = {Rashba cavity QED: a route towards the superradiant quantum phase transition},
author = {Pierre Nataf and Thierry Champel and Gianni Blatter and Denis M. Basko},
journal= {arXiv preprint arXiv:1907.02938},
year = {2019}
}
Comments
10 pages, 4 figures