3 papers
astro-ph.CO2026
A consistent formulation of stochastic inflation I: Non-Markovian effects and issues beyond linear perturbations
Diego Cruces, Tomotaka Kuroda
We investigate the origin of non-Markovianity in stochastic inflation and its implications for nonlinear perturbation theory. In the Schwinger--Keldysh formulation, the noise terms…
astro-ph.CO2026
Numerical simulation of the stochastic formalism including non-Markovianity
Masahiro Kawasaki, Tomotaka Kuroda
We numerically investigate stochastic dynamics in cosmology by solving Langevin equations for Infrared (IR) modes with stochastic noises generated by Ultraviolet (UV) modes at the…
astro-ph.CO2025
Primordial black holes from a curvaton: the role of bimodal distributions
Tomotaka Kuroda, Atsushi Naruko, Vincent Vennin +1
We investigate the formation of primordial black holes in curvaton models of inflation, where the curvature perturbation is not only generated by the inflaton but also by a light s…