2 papers
astro-ph.CO2026
A Fast Method to Compute Scalar Induced Gravitational Waves on a Lattice with Primordial Non-Gaussianities
Giovanni Piccoli
Scalar Induced Gravitational Waves (SIGW) are generated at second order in perturbation theory and to achieve observational relevance, inflationary dynamics must evade the standard…
hep-ph2026
Probing the small-scale primordial power spectrum via relic neutrinos and acoustic reheating
Giovanni Piccoli, Sunny Vagnozzi, Joseph Silk
We show that the dissipation of small-scale perturbations through diffusion damping after neutrino decoupling lowers the present-day neutrino temperature compared to the expected v…