http://arxiv.org/abs/2212.04094
Detecting gravitational waves with a frequency higher than 10 kHz requires a new idea. In previous papers, we proposed magnon gravitational wave detectors and gave the first limit on GHz gravitational waves by reinterpreting the existing data of axion dark matter experiments. In this paper, we show that the sensitivity can be improved by constructing the detector specific to gravitational waves. In particular, we employ an infinite sum of terms in the expansion of Fermi normal coordinates to probe gravitational waves with a wavelength comparable to the detector size. As a consequence, we obtain the sensitivity around $h_c \sim 10^{-20}$.
A. Ito and J. Soda
Fri, 9 Dec 22
67/75
Comments: 13 pages, 2 figures