Mirror quiescence and high-sensitivity position measurements with feedback

Details Mirror quiescence and high-sensitivity position measurements with feedback Mirror quiescence and high-sensitivity position measurements with feedback

2001-11-12

arxiv.org/abs/quant-ph/0111067v1

Phys.Rev. A65 (2002) 063803

Physics

Quantum Physics

25 pages, 11 figures

Scientific paper

10.1103/PhysRevA.65.063803

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.

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