Constant-Roll Inflation
Cosmology and Nongalactic Astrophysics
2025-04-25 v1 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
Constant-roll inflation is a distinctive class of phenomenological inflationary models in which the inflaton's rate of roll remains constant. It provides an exact solution that is compatible with the latest observational constraints and offers a natural framework for enhancing the curvature power spectrum, which is relevant to the formation of primordial black holes. In this paper, I review constant-roll inflation in memory of Alexei Starobinsky.
Keywords
Cite
@article{arxiv.2504.16757,
title = {Constant-Roll Inflation},
author = {Hayato Motohashi},
journal= {arXiv preprint arXiv:2504.16757},
year = {2025}
}
Comments
22 pages, 6 figures. Invited contribution to the volume "Open Issues in Gravitation and Cosmology - Original Contributions, Essays and Recollections in Honor of Alexei Starobinsky", to be published by Springer, edited by Andrei Barvinsky and Alexander Kamenshchik