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Quantum Signatures of the Optomechanical Instability

MPG-Autoren

Hammerer,  K.
AEI-Hannover, MPI for Gravitational Physics, Max Planck Society;

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Volltexte (frei zugänglich)

1112.6200
(Preprint), 3MB

PRL109_253601.pdf
(beliebiger Volltext), 491KB

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Zitation

Qian, J., Clerk, A. A., Hammerer, K., & Marquardt, F. (2012). Quantum Signatures of the Optomechanical Instability. Physical Review Letters, 109: 253601. doi:10.1103/PhysRevLett.109.253601.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-000E-EA46-4
Zusammenfassung
In the past few years, coupling strengths between light and mechanical motion in optomechanical setups have improved by orders of magnitude. Here we show that, in the standard setup under continuous laser illumination, the steady state of the mechanical oscillator can develop a non-classical, strongly negative Wigner density if the optomechanical coupling is large at the single-photon level. Because of its robustness, such a Wigner density can be mapped using optical homodyne tomography. These features are observed near the onset of the instability towards self-induced oscillations. We show that there are also distinct signatures in the photon-photon correlation function $g^{(2)}(t)$ in that regime, including oscillations decaying on a time scale not only much longer than the optical cavity decay time, but even longer than the \emph{mechanical} decay time.