Primordial black holes and their gravitational-wave signatures

E Bagui, S Clesse, V De Luca, JM Ezquiaga… - Living Reviews in …, 2025‏ - Springer
In the recent years, primordial black holes (PBHs) have emerged as one of the most
interesting and hotly debated topics in cosmology. Among other possibilities, PBHs could …

Inflation and primordial black holes

O Özsoy, G Tasinato - Universe, 2023‏ - mdpi.com
We review conceptual aspects of inflationary scenarios able to produce primordial black
holes by amplifying the size of curvature fluctuations to the level required to trigger black …

Constraining primordial black hole formation from single-field inflation

J Kristiano, J Yokoyama - Physical Review Letters, 2024‏ - APS
The most widely studied formation mechanism of a primordial black hole is collapse of large-
amplitude perturbation on small scales generated in single-field inflation. In this Letter, we …

Hybrid α-attractors, primordial black holes and gravitational wave backgrounds

M Braglia, A Linde, R Kallosh… - Journal of Cosmology and …, 2023‏ - iopscience.iop.org
We investigate the two-stage inflation regime in the theory of hybrid cosmological α-
attractors. The spectrum of inflationary perturbations is compatible with the latest …

Inflationary Butterfly Effect: Nonperturbative Dynamics from Small-Scale Features

A Caravano, K Inomata, S Renaux-Petel - Physical Review Letters, 2024‏ - APS
For the first time, we investigate the nonperturbative dynamics of single field inflation with a
departure from slow roll. Using simulations, we find that oscillatory features in the potential …

Anatomy of single-field inflationary models for primordial black holes

A Karam, N Koivunen, E Tomberg… - … of Cosmology and …, 2023‏ - iopscience.iop.org
We construct an analytically solvable simplified model that captures the essential features
for primordial black hole (PBH) production in most models of single-field inflation. The …

Squeezed bispectrum and one-loop corrections in transient constant-roll inflation

H Motohashi, Y Tada - Journal of Cosmology and Astroparticle …, 2023‏ - iopscience.iop.org
In canonical single-field inflation, the production of primordial black holes (PBH) requires a
transient violation of the slow-roll condition. The transient ultra slow-roll inflation is an …

Questions on calculation of primordial power spectrum with large spikes: the resonance model case

K Inomata, M Braglia, X Chen - Journal of Cosmology and …, 2023‏ - iopscience.iop.org
Inflationary models predicting a scale-dependent large amplification of the density
perturbations have recently attracted a lot of attention because the amplified perturbations …

Primordial black holes from single-field inflation: a fine-tuning audit

PS Cole, AD Gow, CT Byrnes… - Journal of Cosmology and …, 2023‏ - iopscience.iop.org
All single-field inflationary models invoke varying degrees of tuning in order to account for
cosmological observations. Mechanisms that generate primordial black holes (PBHs) from …

Highly non-Gaussian tails and primordial black holes from single-field inflation

YF Cai, XH Ma, M Sasaki, DG Wang… - Journal of Cosmology …, 2022‏ - iopscience.iop.org
For primordial perturbations, deviations from Gaussian statistics on the tail of the probability
distribution can be associated with non-perturbative effects of inflation. In this paper, we …