https://doi.org/10.1140/epjc/s10052-019-7542-5
Regular Article - Theoretical Physics
Upper limits on the amplitude of ultra-high-frequency gravitational waves from graviton to photon conversion
1
School of Physics and Astronomy, Cardiff University, The Parade, Cardiff, CF24 3AA, UK
2
School of Physics and Astronomy, Birmingham University, Edgbaston Park Rd, Birmingham, B15 2TT, UK
3
Department of Physics, Novosibirsk State University, 2 Pirogova Street, Novosibirsk, 630090, Russia
* e-mail: EjlliA@cardiff.ac.uk
Received:
28
September
2019
Accepted:
9
December
2019
Published online:
26
December
2019
In this work, we present the first experimental upper limits on the presence of stochastic gravitational waves in a frequency band with frequencies above 1 THz. We exclude gravitational waves in the frequency bands from 
Hz and 
Hz down to a characteristic amplitude of 
and 
at 95% confidence level, respectively. To obtain these results, we used data from existing facilities that have been constructed and operated with the aim of detecting weakly interacting slim particles, pointing out that these facilities are also sensitive to gravitational waves by graviton to photon conversion in the presence of a magnetic field. The principle applies to all experiments of this kind, with prospects of constraining (or detecting), for example, gravitational waves from light primordial black-hole evaporation in the early universe.
© The Author(s), 2019
