HAL : hal-00154512, version 1

arXiv : 0706.2036

DOI : 10.1103/PhysRevLett.99.110801

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Physical Review Letters 99 (2007) 110801

Observation of back-action cancellation in interferometric and weak force measurements

T. Caniard 1, P. Verlot 1, T. Briant 1, P. -F. Cohadon 1, A. Heidmann 1

(2007)

We experimentally demonstrate a cancellation of back-action noise in optical measurements. Back-action cancellation was first proposed within the framework of gravitational-wave detection by dual resonators as a way to drastically improve their sensitivity. We have developed an experiment based on a high-finesse Fabry-Perot cavity to study radiation-pressure effects in ultra-sensitive displacement measurements. Using an intensity-modulated intracavity field to mimic the quantum radiation-pressure noise, we report the first observation of back-action cancellation due to a destructive interference between radiation-pressure effects on both mirrors of the cavity. We have observed a sensitivity improvement by a factor larger than 20 both in displacement and weak force measurements.

1 :	Laboratoire Kastler Brossel (LKB (Jussieu))
	CNRS : UMR8552 – Université Paris VI - Pierre et Marie Curie – Ecole Normale Supérieure de Paris - ENS Paris

Domaine

:

Physique/Physique Quantique Physique/Relativité Générale et Cosmologie Quantique

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Contributeur : Antoine Heidmann <>

Soumis le : Mercredi 13 Juin 2007, 21:55:49

Dernière modification le : Mercredi 19 Septembre 2007, 14:39:17