26 January 2008 Observation of radiation-pressure effects and back-action cancellation in interferometric measurements
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Abstract
Radiation pressure exerted by light in interferometric measurements is responsible for displacements of mirrors which appear as an additional back-action noise and limit the sensitivity of the measurement. We experimentally study these effects by monitoring in a very highfinesse optical cavity the displacements of a mirror with a sensitivity at the 10-20 m/√Hz level. This unique sensitivity is a step towards the first observation of the fundamental quantum effects of radiation pressure and the resulting standard quantum limit in interferometric measurements. Our experiment may become a powerful facility to test quantum noise reduction schemes, and we already report the first experimental demonstration of a back-action noise cancellation. Using a classical radiation-pressure noise to mimic the quantum noise of light, we have observed a drastic improvement of sensitivity both in position and force measurements.
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A. Heidmann, T. Caniard, P. Verlot, T. Briant, P.-F. Cohadon, "Observation of radiation-pressure effects and back-action cancellation in interferometric measurements", Proc. SPIE 6906, Quantum Electronics Metrology, 69060K (26 January 2008); doi: 10.1117/12.763304; https://doi.org/10.1117/12.763304
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