title: Remnants of semiclassical bistability in the few-photon regime of cavity QED.
abstract: Broadband homodyne detection of the light transmitted by a Fabry-Perot cavity containing a strongly-coupled (133)Cs atom is used to probe the dynamic optical response in a regime where semiclassical theory predicts bistability but strong quantum corrections should apply. While quantum fluctuations destabilize true equilibrium bistability, our observations confirm the existence of metastable states with finite lifetimes and a hysteretic response is apparent when the optical drive is modulated on comparable timescales. Our experiment elucidates remnant semiclassical behavior in the attojoule (~10 photon) regime of single-atom cavity QED, of potential significance for ultra-low power photonic signal processing.
authors: Edward L. Ginzton Laboratory, Stanford University, Stanford, California 94305, USA. jkerc@jila.colorado.edu
authors: Joseph
authors: J
authors: Kerckhoff
authors: Michael A
authors: MA
authors: Armen
authors: Hideo
authors: H
authors: Mabuchi
mesh_terms: D003198:Computer Simulation; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D007368:Interferometry / Q000295:instrumentation*; D008027:Light; D008962:Models, Theoretical; D012542:Scattering, Radiation