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Backaction Amplification and Quantum Limits in Optomechanical Measurements

P. Verlot, A. Tavernarakis, T. Briant, P.-F. Cohadon, and A. Heidmann
Phys. Rev. Lett. 104, 133602 – Published 31 March 2010
Physics logo See Synopsis: Turning backaction around

Abstract

Optical interferometry is by far the most sensitive displacement measurement technique available, with sensitivities at the 1020m/Hz level in the large-scale gravitational-wave interferometers currently in operation. Second-generation interferometers will experience a tenfold improvement in sensitivity and be mainly limited by quantum noise, close to the standard quantum limit (SQL), once considered as the ultimate displacement sensitivity achievable by interferometry. In this Letter, we experimentally demonstrate one of the techniques envisioned to go beyond the SQL: amplification of a signal by radiation-pressure backaction in a detuned cavity.

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  • Received 20 December 2009

DOI:https://doi.org/10.1103/PhysRevLett.104.133602

©2010 American Physical Society

Synopsis

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Turning backaction around

Published 2 April 2010

Signal amplification in an optical interferometer may push the sensitivity of measurements beyond the standard quantum limit.

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Authors & Affiliations

P. Verlot, A. Tavernarakis, T. Briant, P.-F. Cohadon, and A. Heidmann

  • Laboratoire Kastler Brossel, ENS, UPMC, CNRS; case 74, 4 place Jussieu, 75005 Paris, France

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Issue

Vol. 104, Iss. 13 — 2 April 2010

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