2 papers
hep-ph2026
Tachyonic particle production: quantum 2PI formalism with momentum exchanging collisions
Kimmo Kainulainen, Sami Nurmi, Olli Väisänen
Oscillating spacetime curvature can drive particle production during reheating, whose accurate modeling requires the use of non-perturbative out-of-equilibrium methods. Tachyonic i…
astro-ph.CO2026
Stochastic Gravitational Waves from Modulated Reheating
Michele Benaco, Dimitrios Karamitros, Sami Nurmi +1
We investigate scalar-induced stochastic gravitational waves from adiabatic curvature perturbations sourced by a spectator field via the modulated reheating mechanism. We consider…