Inflation with shallow dip and primordial black holes
Cosmology and Nongalactic Astrophysics
2024-12-02 v3
Abstract
Primordial black holes may arise through ultra slow-roll inflation. In this work we study a toy model of ultra slow-roll inflation with a shallow dip. The ultra slow-roll stage enhances the curvature perturbations and thus the primordial scalar power spectrum. We analyze the features of the power spectrum numerically and analytically, and then give a rough estimate of the lower and upper bound of the enhancement. These large perturbations also produce second order gravitational waves, which are in the scope of future observations.
Keywords
Cite
@article{arxiv.2307.00510,
title = {Inflation with shallow dip and primordial black holes},
author = {Bao-Min Gu and Fu-Wen Shu and Ke Yang},
journal= {arXiv preprint arXiv:2307.00510},
year = {2024}
}
Comments
12pages, 15 figures