Noise reduction in gravitational wave interferometers using feedback

TL;DR

This paper demonstrates that a quantum locking feedback scheme can substantially enhance the sensitivity of future gravitational wave interferometers by reducing back action noise.

Contribution

It introduces a feedback-based quantum locking method that improves gravitational wave detector sensitivity beyond previous approaches.

Findings

Significant reduction in back action noise achieved.

Enhanced sensitivity in gravitational wave detection.

Potential for improved detection of faint signals.

Abstract

We show that the quantum locking scheme recently proposed by Courty {\it et al.} [Phys. Rev. Lett. {\bf 90}, 083601 (2003)] for the reduction of back action noise is able to significantly improve the sensitivity of the next generation of gravitational wave interferometers.