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Beating quantum limits in interferometers with quantum locking of mirrors
A Heidmann, J. -M. Courty, M. Pinard +1
The sensitivity in interferometric measurements such as gravitational-wave detectors is ultimately limited by quantum noise of light. We discuss the use of feedback mechanisms to r…
Optomechanical characterization of acoustic modes in a mirror
T. Briant, P. F. Cohadon, A. Heidmann +1
We present an experimental study of the internal mechanical vibration modes of a mirror. We determine the frequency repartition of acoustic resonances via a spectral analysis of th…
Thermal and back-action noises in dual-sphere gravitational-waves detectors
T. Briant, M. Cerdonio, L. Conti +3
We study the sensitivity limits of a broadband gravitational-waves detector based on dual resonators such as nested spheres. We determine both the thermal and back-action noises wh…
Back-action cancellation in interferometers by quantum locking
J. -M. Courty, A. Heidmann, M. Pinard
We show that back-action noise in interferometric measurements such as gravitational-waves detectors can be completely suppressed by a local control of mirrors motion. An optomecha…