Inflation with shallow dip and primordial black holes

2023/07/02 by Gu, Bao-Min, Shu, Fu-Wen, Yang, Ke · 2 citations
#Cosmology and Nongalactic Astrophysics (astro-ph.CO) #FOS: Physical sciences

paper · doi:10.48550/arxiv.2307.00510

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.

Cited by

• ΛvCF: Extending ΛCDM into a Unified Model with Particle Creation
• Scalar-induced gravitational waves in spatially covariant gravity

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