44 citations · 104 across the 6 of their papers we have counts for
6 papers
Gravitational Waves in Axion Dark Matter
Chong-Sun Chu, Jiro Soda, Daiske Yoshida
Axion dark matter is interesting as it allows a natural coupling to the gravitational Chern-Simons term. In the presence of an axion background, the gravitational Chern-Simons term…
Quasinormal modes of -forms in spherical black holes
Daiske Yoshida, Jiro Soda
We study the quasinormal modes of -form fields in spherical black holes in -dimensions. Using the spherical symmetry of the black holes and gauge symmetry, we show the -fo…
Electromagnetic waves propagating in the string axiverse
Daiske Yoshida, Jiro Soda
It is widely believed that axions are ubiquitous in string theory and could be the dark matter. The peculiar features of the axion dark matter are coherent oscillations and a coupl…
Exploring the string axiverse and parity violation in gravity with gravitational waves
Daiske Yoshida, Jiro Soda
We show that the parametric resonance of gravitational waves occurs due to the axion coherent oscillation and the circular polarization of gravitational waves is induced by the Che…
Electromagnetic Memory Effect Induced by Axion Dark Matter
Daiske Yoshida, Jiro Soda
Memory effects of gravitational waves from astronomical events or primordial universe might have the information of new physics. It is intriguing to observe that the memory effect…
Quasi-Normal Modes of Black Holes in Lovelock Gravity
Daiske Yoshida, Jiro Soda
We study quasinormal modes of black holes in Lovelock gravity. We formulate the WKB method adapted to Lovelock gravity for the calculation of quasinormal frequencies (QNFs). As a d…