title: Enhanced quantum nonlinearities in a two-mode optomechanical system.
abstract: In cavity optomechanics, nanomechanical motion couples to a localized optical mode. The regime of single-photon strong coupling is reached when the optical shift induced by a single phonon becomes comparable to the cavity linewidth. We consider a setup in this regime comprising two optical modes and one mechanical mode. For mechanical frequencies nearly resonant to the optical level splitting, we find the photon-phonon and the photon-photon interactions to be significantly enhanced. In addition to dispersive phonon detection in a novel regime, this offers the prospect of optomechanical photon measurement. We study these quantum nondemolition detection processes using both analytical and numerical approaches.
authors.affiliation: Institute for Theoretical Physics, Universität Erlangen-Nürnberg, Erlangen, Germany. max.ludwig@physik.uni-erlangen.de
authors.forename: Max
authors.initials: M
authors.lastname: Ludwig
authors.forename: Amir H
authors.initials: AH
authors.lastname: Safavi-Naeini
authors.forename: Oskar
authors.initials: O
authors.lastname: Painter
authors.forename: Florian
authors.initials: F
authors.lastname: Marquardt