High-Frequency Gravitational Waves on BREAD

TL;DR

This paper evaluates BREAD, a novel high-frequency gravitational wave detector, demonstrating its potential to detect extremely weak GWs in the 0.05 to 200 THz range with high sensitivity.

Contribution

It introduces BREAD as a new experimental setup for high-frequency gravitational wave detection and analyzes its sensitivity and directional coverage capabilities.

Findings

BREAD can detect GWs with strains as low as 10^{-21} at 0.1 THz.

BREAD's sensitivity extends to strains of 10^{-25} at 200 THz.

The detector's frequency range and sensitivity are competitive with existing proposals.

Abstract

The use of light axion dark matter experiments as high-frequency gravitational wave (HFGW) detectors has garnered increasing attention in recent years. We explore the capabilities of the Broadband Reflector Experiment for Axion Detection (BREAD) in probing the GW parameter space and study the directional dependence of its coverage. This detector can investigate frequencies ranging from 0.05 to 200 THz. We find that employing single photon detectors BREAD is sensitive to GWs with characteristic strains as low as $10^{-21}$ at 0.1 THz and $10^{-25}$ at 200 THz with a year exposure time, making it competitive with other proposals operating at similar frequencies.