We utilize high-bandwidth phase quadrature homodyne measurement of the light transmitted through a Fabry-Perot cavity, driven strongly and on resonance, to detect excess phase noise induced by a single intracavity atom. We analyze the correlation properties and driving-strength dependence of the atom-induced phase noise to establish that it corresponds to the long-predicted phenomenon of spontaneous dressed-state polarization. Our experiment thus provides a demonstration of cavity quantum electrodynamics in the strong driving regime, in which one atom interacts strongly with a many-photon cavity field to produce novel quantum stochastic behavior.
@article{arxiv.0907.4804,
title = {Spontaneous dressed-state polarization in the strong driving regime of cavity QED},
author = {Michael A. Armen and Anthony E. Miller and Hideo Mabuchi},
journal= {arXiv preprint arXiv:0907.4804},
year = {2015}
}