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Optomechanical detection of weak forces

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arxiv quant-ph/0303012 v1 pith:WB7AXAGN submitted 2003-03-03 quant-ph cond-mat.mes-hallgr-qc

classification quant-phcond-mat.mes-hallgr-qc
keywords ablefeedbackforcesimprovenoiseoptomechanicalsystemsused
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Optomechanical systems are often used for the measurement of weak forces. Feedback loops can be used in these systems for achieving noise reduction. Here we show that even though feedback is not able to improve the signal to noise ratio of the device in stationary conditions, it is possible to design a nonstationary strategy able to improve the sensitivity.

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