Improving force sensitivity by amplitude measurement of light reflected from a detuned optomechanical cavity

• URL: http://arxiv.org/abs/2105.10510v1
• Date: Fri, 21 May 2021 18:00:02 GMT
• Title: Improving force sensitivity by amplitude measurement of light reflected from a detuned optomechanical cavity
• Authors: Kentaro Komori, Takuya Kawasaki, Sotatsu Otabe, Yutaro Enomoto, Yuta Michimura, Masaki Ando
• Abstract summary: Measure the amplitude quadrature of the light reflected from a detuned optomechanical cavity inside which a stiff optical spring is generated. This method provides a simple way to improve the sensitivity in experiments limited by quantum back-action without injection of squeezed light or stable homodyne readout.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: The measurement of weak continuous forces exerted on a mechanical oscillator is a fundamental problem in various physical experiments. It is fundamentally impeded by quantum back-action from the meter used to sense the displacement of the oscillator. In the context of interferometric displacement measurements, we here propose and demonstrate the working principle of a scheme for coherent back-action cancellation. By measuring the amplitude quadrature of the light reflected from a detuned optomechanical cavity inside which a stiff optical spring is generated, back-action can be cancelled in a narrow band of frequencies. This method provides a simple way to improve the sensitivity in experiments limited by quantum back-action without injection of squeezed light or stable homodyne readout.

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