Beating quantum limits in optomechanical sensor by cavity detuning

Abstract

We study the quantum limits in an optomechanical sensor based on a detuned high-finesse cavity with a movable mirror. We show that the radiation pressure exerted on the mirror by the light in the detuned cavity induces a modification of the mirror dynamics and makes the mirror motion sensitive to the signal. This leads to an amplification of the signal by the mirror dynamics, and to an improvement of the sensor sensitivity beyond the standard quantum limit, up to an ultimate quantum limit only related to the mechanical dissipation of the mirror. This improvement is somewhat similar to the one predicted in detuned signal-recycled gravitational-waves interferometers, and makes a high-finesse cavity a model system to test these quantum effects

Cited by in corpus (9)

• Radiation-pressure cooling and optomechanical instability of a micro-mirror
• Cavity Optomechanics
• Cavity optomechanical coupling assisted by an atomic gas
• Radiation-pressure self-cooling of a micromirror in a cryogenic environment
• Mechanical mode dependence of bolometric back-action in an AFM microlever
• Quantum-limited force measurement with an optomechanical device
• Increasing the sensitivity of future gravitational-wave detectors with double squeezed-input
• Quantum variational measurement and the "optical lever" intracavity topology of gravitational-wave detectors
• Sensitivity below the standard quantum limit in gravitational wave detectors with Michelson-Fabry-Perot readout