Simplified optical configuration for a sloshing-speedmeter-enhanced gravitational wave detector

TL;DR

This paper introduces a simplified optical setup for gravitational wave detectors that enhances low-frequency sensitivity by integrating a sloshing cavity into existing interferometers, leveraging the speedmeter concept.

Contribution

It presents a practical and simplified optical configuration that improves quantum-noise limited sensitivity at low frequencies in gravitational wave detectors.

Findings

Enhanced low-frequency sensitivity demonstrated

Practical integration with existing interferometers shown

Potential for improved gravitational wave detection sensitivity

Abstract

We propose a new optical configuration for an interferometric gravitational wave detector based on the speedmeter concept using a sloshing cavity. Speedmeters provide an inherently better quantum-noise limited sensitivity at low frequencies than the currently used Michelson interferometers. We show that a practical sloshing cavity can be added relatively simply to an existing dual-recycled Michelson interferometer such as Advanced LIGO.