• DOI:10.1103/PhysRevD.104.103017
• Corpus ID: 239885294

Did Goryachev et al. detect megahertz gravitational waves?

@article{Lasky2021DidG,
  title={Did Goryachev 
et al.
 detect megahertz gravitational waves?},
  author={Paul D. Lasky and Eric Thrane},
  journal={Physical Review D},
  year={2021}
}

• P. Lasky, E. Thrane
• Published 25 October 2021
• Physics, Geology
• Physical Review D

Goryachev et al. [1] recently announced the detection of “two strongly significant events” in their Bulk Acoustic Wave High Frequency Gravitational Wave Antenna. They claim many possibilities for the cause of these events, including high-frequency megahertz gravitational waves. We demonstrate these events are not due to gravitational waves for two reasons. 1) The inferred stochastic gravitational-wave background from these events implies the gravitational-wave energy density of the Universe is Ωgw ≈ 10 , approximately 10 times the closure density of the Universe. 2) The low-frequency gravitational-wave memory signal that accompanies any high-frequency gravitationalwave source visible by the current generation of high-frequency detectors would have been visible by LIGO/Virgo as a transient burst with signal-to-noise ratio & 10. The non-detection of such loud memory bursts throughout the operation of LIGO/Virgo rules out the gravitational-wave explanation for the high-frequency events detected by Goryachev et al. We discuss broader implications of this work for the ongoing experimental search for ultra high-frequency (MHz-GHz) gravitational waves.