Year: 2024
Type: article
Abstract: We develop a C++ package of the STOchastic LAttice Simulation (STOLAS) of cosmic inflation. It performs the numerical lattice simulation in the application of the stochastic-δ N formalism. STOLAS can directly compute the three-dimensional map of the observable curvature perturbation without estimating its statistical properties. In its application to two toy models of inflation, chaotic inflation and Starobinsky's linear-potential inflation, we confirm that STOLAS is well-consistent with the standard perturbation theory. Furthermore, by introducing the importance sampling technique, we have success in numerically sampling the current abundance of primordial black holes (PBHs) in a non-perturbative way. The package is available at https://github.com/STOchasticLAtticeSimulation/STOLAS_dist .
Authors: Yurino Mizuguchi, Tomoaki Murata, Yuichiro Tada
Institutions: Nagoya University, Rikkyo University
Language: English
Subfield: Astronomy and Astrophysics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W4405570370