Orientational alignment in Cavity Quantum Electrodynamics

Published in Physical Review A, 2018

Jonathan Keeling and Peter G. Kirton Phys. Rev. A 97, 053836 (2018)



We consider the orientational alignment of dipoles due to strong matter-light coupling for a nonvanishing density of excitations. We compare various approaches to this problem in the limit of large numbers of emitters and show that direct Monte Carlo integration, mean-field theory, and large deviation methods match exactly in this limit. All three results show that orientational alignment develops in the presence of a macroscopically occupied polariton mode and that the dipoles asymptotically approach perfect alignment in the limit of high density or low temperature.