Can the phase of radiation pressure fluctuations be flipped in a single path for laser interferometric gravitational wave detectors?

TL;DR

This paper investigates a novel method to cancel radiation pressure noise in space-based gravitational wave detectors using phase-flipped squeezed light, but finds it unfeasible in a single-path setup without long cavities.

Contribution

It proposes a concept for radiation pressure noise cancellation with phase-flipped squeezed light and demonstrates its impossibility in a single-path configuration without cavities.

Findings

No configuration exists for single-path FPSL-based RP noise cancellation.

The method is aimed at low-frequency space-based GW detectors below 1 Hz.

The study constrains the design options for quantum noise reduction in such detectors.

Abstract

Radiation pressure (RP) noise, one component of quantum noise, can limit the sensitivity of laser interferometric gravitational wave (GW) detectors at lower frequencies. We conceived a possible RP noise cancellation method, using phase flipped ponderomotive-squeezed light (FPSL) incident on free-mass mirrors in interferometers' arms. This possibility is investigated under the constraint that the method is for space-based GW detectors in a broad frequency band lower than 1 Hz without using a long optical cavity. Considering various patterns in a single path small-scale case to generate the FPSL, we proved that no configuration exists in the single path case.