Strain sensitivity enhancement in a Grover-Michelson interferometer

TL;DR

This paper proposes a novel interferometer design using Grover coins to enhance strain sensitivity for gravitational wave detection, with quantitative analysis and potential performance improvements.

Contribution

It introduces a Grover-Michelson interferometer configuration and analyzes its noise-to-signal ratio, demonstrating potential sensitivity enhancements over traditional setups.

Findings

Quantitative analysis of noise-to-signal ratio in GMI

Signal enhancement via light-recycling arrangements

Potential for improved gravitational wave detection sensitivity

Abstract

The Michelson interferometric phase detection resolution can be enhanced by replacing conventional beam splitters with novel directionally unbiased four-port scatterers, such as Grover coins. We present a quantitative analysis of the noise-to-signal ratio of sideband frequencies generated by gravitational wave-induced phase perturbations in a Grover-Michelson interferometer (GMI). We discuss the principles of GMI signal enhancement and demonstrate how combining this configuration with additional light-recycling arrangements further enhances the performance.