SAMOP 2023 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 48: Optomechanics II
Q 48.6: Talk
Thursday, March 9, 2023, 12:30–12:45, E214
Nonclassical photon statistics in two-tone continuously driven optomechanics — •Kjetil Borkje1, Francesco Massel1, and Jack Harris2,3 — 1Department of Science and Industry Systems, University of South-Eastern Norway, PO Box 235, NO-3603 Kongsberg, Norway — 2Department of Physics, Yale University, 217 Prospect Street, New Haven, Connecticut 06520, USA — 3Department of Applied Physics, Yale University, 15 Prospect Street, New Haven, Connecticut 06520, USA
We present a study of a standard optomechanical system where the cavity mode is continuously driven at two different frequencies, and where sideband photons are detected by single photon detectors after frequency filtering the output from the cavity mode around its resonance frequency. We first derive the normalized second order coherence associated with the detected photons, and show that it contains signatures of the quantum nature of the mechanical mode which would be absent with only single-tone driving. To identify model-independent nonclassical features, we derive two inequalities for the sideband photon statistics that should be valid in any classical model of the system. We show that these inequalities are violated in the proposed setup. This is provided that the average phonon occupation number of the mechanical mode is sufficiently small, which in principle can be achieved through sideband cooling intrinsic to the setup. The proposed setup thus employs a mechanical oscillator in order to generate a steady-state source of nonclassical radiation.
[1] Børkje et al., Physical Review A, 104, 063507 (2021)