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Mirror quiescence and high-sensitivity position measurements with feedback
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Mirror quiescence and high-sensitivity position measurements with feedback
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We present a detailed study of how phase-sensitive feedback schemes can be used to improve the performance of optomechanical devices. Considering the case of a cavity mode coupled to an oscillating mirror by the radiation pressure, we show how feedback can be used to reduce the position noise spectrum of the mirror, cool it to its quantum ground state, or achieve position squeezing. Then, we show that even though feedback is not able to improve the sensitivity of stationary position spectral measurements, it is possible to design a nonstationary strategy able to increase this sensitivity.
Forward citations
Cited by 1 Pith paper
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True and apparent motion of optomechanical resonators, with applications to feedback cooling of gravitational wave detector test masses
Extends prior two-photon formalism to compute true motion and optimal cooling in multi-DOF GW detector test masses, finding sub-unity occupation numbers possible over the oscillator bandwidth for common definitions.
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