Gravitational waves generate oscillating electromagnetic effects in the vicinity of external electric and magnetic fields. I will discuss this phenomenon with a particular focus on reinterpreting the results of axion haloscopes based on lumped-element detectors, which probe gravitational waves in the 100 kHz-100 MHz range. I will show that the DMRadio program will have the potential to...
We show as scalar polarizations of the gravitational wave spectrum can interact non-collisionally with astrophysical media, once the notions of gravitational plasma and kinematic Landau damping are properly formulated in modified theories of gravity. We analytically determine the damping rate of the scalar mode and we discuss the physical properties of the traversed medium in order such a...
We present a numerical method able to treat the case of large thermal velocity of the background distribution in the integration of the plasma dielectric function previously introduced. We exploit this technique to give quantitative estimates of the expected damping for sub-horizon modes interacting with the cosmological dark matter medium in the early Universe. Then, we extend our analysis by...
In my talk I will present CosmoLattice: a new public code for lattice simulations of classical field theories in an expanding universe. The code is capable of simulating scalars, gauge fields and gravitational waves, and is currently being used in the study of relevant early universe scenarios. I will discuss its basic features and future updates, and explain how we can use it to characterize...
