A phase-sensitive optomechanical amplifier for quantum noise reduction in laser interferometers

TL;DR

This paper proposes an optomechanical device designed to reduce quantum noise in gravitational wave detectors by mitigating readout losses, enhancing the effectiveness of quantum non-demolition techniques like squeezed vacuum injection.

Contribution

Introduction of a phase-sensitive optomechanical amplifier that mitigates readout losses, improving quantum noise reduction in gravitational wave interferometers.

Findings

The device effectively reduces quantum noise in simulations.

It enhances the performance of quantum non-demolition schemes.

Potential for improved gravitational wave detection sensitivity.

Abstract

The sensitivity of future gravitational wave interferometers is expected to be limited through-out the detection band by quantum vacuum fluctuations, which can be reduced by quantum non-demolition methods such as squeezed vacuum injection. However, optical losses in the readout chainseverely limit the effectiveness of such schemes. We propose an optomechanical device to be installedat the output of the detector that mitigates the effect of readout loss, thus allowing the detector tobetter exploit quantum noise evasion schemes.