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A numerical approach to stochastic inflation and primordial black holes

Research output: Contribution to Journal/MagazineConference articlepeer-review

Published
Article number012010
<mark>Journal publication date</mark>21/02/2022
<mark>Journal</mark>Journal of Physics: Conference Series
Issue number1
Volume2156
Publication StatusPublished
<mark>Original language</mark>English
Event17th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2021 - Virtual, Online
Duration: 26/08/20213/09/2021

Conference

Conference17th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2021
CityVirtual, Online
Period26/08/213/09/21

Abstract

Certain models of cosmic inflation produce strong cosmological perturbations at short length scales, which may later collapse into primordial black holes. To find the statistics of these strong perturbations and the ensuing black holes, it is necessary to go beyond linear perturbation theory. Stochastic inflation provides a way to take the leading non-linear effects into account. In this contribution, I discuss recent progress in numerical computations of stochastic inflation. A numerical approach can include more of the non-linearities than an analytical calculation, and can be applied to single-field inflationary models with any potential.

Bibliographic note

Funding Information: This work was supported by the Estonian Research Council grants PRG803, PRG1055, and MOBTT5 and by the EU through the European Regional Development Fund CoE program TK133 “The Dark Side of the Universe”. The work in [3] was done in collaboration with Daniel Figueroa, Sami Raatikainen, and Syksy Räsänen. Publisher Copyright: © 2022 Institute of Physics Publishing. All rights reserved.