The first direct measurement of gravitational waves by the LIGO and Virgo collaborations
has opened up new avenues to explore our Universe. This white paper outlines the …

Gravitational waves (GWs) generate oscillating electromagnetic effects in the vicinity of
external electric and magnetic fields. We discuss this phenomenon with a particular focus on …

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 …

We discuss recent astronomical data showing that the role of massive primordial black holes
in the Universe is much more significant than previously thought, both for the present …

We study graviton-photon conversion in the magnetosphere of a pulsar and explore the
possibility of detecting high frequency gravitational waves with pulsar observations. It is …

In the presence of magnetic fields, gravitational waves are converted into photons and vice
versa. We demonstrate that this conversion leads to a distortion of the cosmic microwave …

We investigate the consistency of a scenario in which the baryon asymmetry, dark matter,
and the cosmic density perturbation are generated simultaneously through the evaporation …

What is the highest energy at which gravitons can be observed? We address this question
by studying graviton-to-photon conversion—the inverse-Gertsenshtein effect—in the …

Inflaton seeds nonthermal leptogenesis by pair-producing right-handed neutrinos in the
seesaw model. We show that the inevitable graviton bremsstrahlung associated with inflaton …

High-frequency gravitational waves (f≳ 1 MHz) may provide a unique signature for the
existence of exotic physics. The lack of current and future gravitational-wave experiments …