Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies

Aggarwal, Nancy, Aguiar, Odylio D., Bauswein, Andreas, Cella, Giancarlo, Clesse, Sebastian, Cruise, Adrian Michael, Domcke, Valerie, Figueroa, Daniel G., Geraci, Andrew, Goryachev, Maxim, Grote, Hartmut ORCID: https://orcid.org/0000-0002-0797-3943, Hindmarsh, Mark, Muia, Francesco, Mukund, Nikhil, Ottaway, David, Peloso, Marco, Quevedo, Fernando, Ricciardone, Angelo, Steinlechner, Jessica, Steinlechner, Sebastian, Sun, Sichun, Tobar, Michael E., Torrenti, Francisco, Ünal, Caner and White, Graham 2021. Challenges and opportunities of gravitational-wave searches at MHz to GHz frequencies. Living Reviews in Relativity 24 (1) , 4. 10.1007/s41114-021-00032-5

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Abstract

The first direct measurement of gravitational waves by the LIGO and Virgo collaborations has opened up new avenues to explore our Universe. This white paper outlines the challenges and gains expected in gravitational-wave searches at frequencies above the LIGO/Virgo band, with a particular focus on Ultra High-Frequency Gravitational Waves (UHF-GWs), covering the MHz to GHz range. The absence of known astrophysical sources in this frequency range provides a unique opportunity to discover physics beyond the Standard Model operating both in the early and late Universe, and we highlight some of the most promising gravitational sources. We review several detector concepts that have been proposed to take up this challenge, and compare their expected sensitivity with the signal strength predicted in various models. This report is the summary of the workshop “Challenges and opportunities of high-frequency gravitational wave detection” held at ICTP Trieste, Italy in October 2019, that set up the stage for the recently launched Ultra-High-Frequency Gravitational Wave (UHF-GW) initiative.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Physics and Astronomy
Additional Information:	License information from Publisher: LICENSE 1: URL: http://creativecommons.org/licenses/by/4.0/, Type: open-access
Publisher:	Springer
ISSN:	2367-3613
Date of First Compliant Deposit:	13 November 2025
Date of Acceptance:	15 September 2021
Last Modified:	13 Nov 2025 10:15
URI:	https://orca.cardiff.ac.uk/id/eprint/182384

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