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JGB acknowledges support from the Research Project PID2021-123012NB-C43 [MICINN-FEDER], and the Centro de Excelencia Severo Ochoa Program CEX2020-001007-S at IFT. TG acknowledges support from the French National Research Agency (ANR) in the framework of the GrAHal project (ANR-22-CE31-0025).

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Prospects for detection of ultra high frequency gravitational waves from compact binary coalescences with resonant cavities

Publicado en:EUROPEAN PHYSICAL JOURNAL C 85 (3): 320- - 2025-03-20 85(3), DOI: 10.1140/epjc/s10052-025-14026-y

Autores: Barrau, Aurelien; Garcia-Bellido, Juan; Grenet, Thierry; Martineau, Killian

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This article aims at clarifying the situation about astrophysical sources that might be observed with haloscope experiments sensitive to gravitational waves in the 1-10 GHz band. The GrAHal setup is taken as a benchmark. We follow a very pedagogical path so that the full analysis can easily be used by the entire community who might not be familiar with the theoretical framework. Different relevant physical regimes are considered in details and some approximations encountered in the literature are questioned. In particular, we carefully take into account the fast drift of the gravitational wave frequency and the associated experimental limitations of different kinds. This has strong impact on sensitivity estimates. We also relax the usual assumption that only the merging phase should be considered. The distances that can be probed are carefully evaluated, taking into account degeneracies between physical parameters. We conclude that any detection in the near future is probably impossible.

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