Abstract

Quantum mechanics sets a lower limit to the precision of continuous position measurements. In an interferometric measurement, the unavoidable backaction results from the radiation pressure force exerted by the light beam on the mirrors: random position fluctuations correlated with the quantum intensity fluctuations of the light field appear as a consequence of this optomechanical coupling. Interestingly, quantum noises are expected to limit the sensitivity of the next generation of gravitational-wave interferometers over a large frequency band. Moreover, in the last decade, a number of groups have observed the effects of radiation pressure on a wide variety of micro and nanomechanical systems. These systems are now entering a regime where quantum mechanical effects of the optomechanical coupling become observable. In spite of these efforts, the effects of quantum radiation pressure force still remain elusive.

© 2013 IEEE