Measurement-based control of a mechanical oscillator at its thermal decoherence rate

D. J. Wilson, V. Sudhir, N. Piro, R. Schilling, A. Ghadimi and T. J. Kippenberg ()
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D. J. Wilson: Institute of Condensed Matter Physics, École Polytechnique Fédérale de Lausanne (EPFL)
V. Sudhir: Institute of Condensed Matter Physics, École Polytechnique Fédérale de Lausanne (EPFL)
N. Piro: Institute of Condensed Matter Physics, École Polytechnique Fédérale de Lausanne (EPFL)
R. Schilling: Institute of Condensed Matter Physics, École Polytechnique Fédérale de Lausanne (EPFL)
A. Ghadimi: Institute of Condensed Matter Physics, École Polytechnique Fédérale de Lausanne (EPFL)
T. J. Kippenberg: Institute of Condensed Matter Physics, École Polytechnique Fédérale de Lausanne (EPFL)

Nature, 2015, vol. 524, issue 7565, 325-329

Abstract: A position sensor is demonstrated that is capable of resolving the zero-point motion of a nanomechanical oscillator in the timescale of its thermal decoherence; it achieves an imprecision that is four orders of magnitude below that at the standard quantum limit and is used to feedback-cool the oscillator to a mean photon number of five.

Date: 2015
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DOI: 10.1038/nature14672

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