Primordial Black Holes Arise When The Inflaton Falls

Abstract

Primordial Black Holes (PBHs) have entered the forefront of theoretical cosmology, due their potential role in phenomena ranging from gravitational waves, to dark matter, to galaxy formation. While producing PBHs from inflationary fluctuations naively would seem to require a large deceleration of the inflaton from its velocity at the horizon exit of CMB scales, in this work we demonstrate that an acceleration from a relatively small downward step in the potential that is transited in much less than an e-fold amplifies fluctuations as well. Depending on the location of the step, such PBHs could explain dark matter or the black holes detected by the gravitational wave interferometers. The perturbation enhancement has a natural interpretation as particle production due to the non-adiabatic transition associated with the step.

6 pages, 3 figures

References in corpus (35)

• Constraints on Primordial Black Holes
• The NANOGrav 12.5-year Data Set: Search For An Isotropic Stochastic Gravitational-Wave Background
• Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
• The cosmological gravitational wave background from primordial density perturbations
• Primordial Black Holes as a dark matter candidate
• Constraints on Earth-mass primordial black holes from OGLE 5-year microlensing events
• Primordial black hole dark matter from single field inflation
• No large population of unbound or wide-orbit Jupiter-mass planets
• Primordial Black Holes and Slow-Roll Violation
• NANOGrav Hints to Primordial Black Holes as Dark Matter
• Did NANOGrav see a signal from primordial black hole formation?
• Solar-Mass Primordial Black Holes Explain NANOGrav Hint of Gravitational Waves
• Primordial Black Holes from a tiny bump/dip in the Inflaton potential
• Seeding primordial black holes in multifield inflation
• The exponential tail of inflationary fluctuations: consequences for primordial black holes
• Primordial seeds of supermassive black holes
• Testing scenarios of primordial black holes being the seeds of supermassive black holes by ultracompact minihalos and CMB $\mu$-distortions
• Oscillations in the stochastic gravitational wave background from sharp features and particle production during inflation
• Non-Gaussian tail of the curvature perturbation in stochastic ultra-slow-roll inflation: implications for primordial black hole production
• Primordial black holes and gravitational waves from parametric amplification of curvature perturbations
• Ultra-slow-roll inflation with quantum diffusion
• NANOGrav results and LIGO-Virgo primordial black holes in axion-like curvaton model
• Supermassive black holes from primordial black hole seeds
• Supermassive black holes formed by direct collapse of inflationary perturbations
• Primordial black holes as dark matter and gravitational waves from bumpy axion inflation
• An analytic approach to non-slow-roll inflation
• Testing Stochastic Gravitational Wave Signals from Primordial Black Holes with Optical Telescopes
• Bayesian analysis of the spin distribution of LIGO/Virgo black holes
• Features of the inflaton potential and the power spectrum of cosmological perturbations
• Constraints on a mixed model of dark matter particles and primordial black holes from the Galactic 511 keV line
• Primordial Black Holes from QCD Axion Bubbles
• The 511 keV Excess and Primordial Black Holes
• NANOGrav signal as mergers of Stupendously Large Primordial Black Holes
• Gravitational waves from type II axion-like curvaton model and its implication for NANOGrav result
• Angular correlation as a novel probe of supermassive primordial black holes

Cited by in corpus (43)

• Non-Gaussianity and the induced gravitational wave background
• Anatomy of single-field inflationary models for primordial black holes
• Turning in the landscape: a new mechanism for generating Primordial Black Holes
• Questions on calculation of primordial power spectrum with large spikes: the resonance model case
• Quantum loop effects on the power spectrum and constraints on primordial black holes
• Constraining Primordial Black Hole Formation from Single-Field Inflation
• Galileon inflation evades the no-go for PBH formation in the single-field framework
• Hybrid $\alpha$-attractors, primordial black holes and gravitational wave backgrounds
• Primordial Black Holes from Multifield Inflation with Nonminimal Couplings
• No-go for the formation of heavy mass Primordial Black Holes in Single Field Inflation
• Amplification of Primordial Perturbations from the Rise or Fall of the Inflaton
• Squeezed bispectrum and one-loop corrections in transient constant-roll inflation
• Non-Gaussianity in inflationary scenarios for primordial black holes
• Primordial non-Gaussianity from ultra slow-roll Galileon inflation
• Scalar induced gravity waves from ultra slow-roll Galileon inflation
• Induced gravitational waves from slow-roll inflation after an enhancing phase
• Planck Constraints and Gravitational Wave Forecasts for Primordial Black Hole Dark Matter Seeded by Multifield Inflation
• Primordial non-Gaussianity as a saviour for PBH overproduction in SIGWs generated by Pulsar Timing Arrays for Galileon inflation
• Consistency conditions and primordial black holes in single field inflation
• Realisation of the ultra-slow roll phase in Galileon inflation and PBH overproduction
• Gravitational waves $\times$ HI intensity mapping: cosmological and astrophysical applications
• Highly asymmetric probability distribution from a finite-width upward step during inflation
• Large fluctuations and Primordial Black Holes
• Inflation, SUSY breaking, and primordial black holes in modified supergravity coupled to chiral matter
• Primordial black holes from Higgs inflation with a Gauss-Bonnet coupling
• Primordial black holes from an inflationary potential valley
• Obviating PBH overproduction for SIGWs generated by Pulsar Timing Arrays in loop corrected EFT of bounce
• Smooth vs instant inflationary transitions: steepest growth re-examined and primordial black holes
• Spectral Distortion Anisotropy from Inflation for Primordial Black Holes
• Constraints on ultra-slow-roll inflation from the third LIGO-Virgo observing run
• Axion Poltergeist
• Primordial black holes generated by fast-roll mechanism in non-canonical natural inflation
• Sudden braking and turning with a two-field potential bump: primordial black hole formation
• Inflationary attractors and radiative corrections in light of ACT data
• Regularized-Renormalized-Resummed loop corrected power spectrum of non-singular bounce with Primordial Black Hole formation
• Diffuse emission from black hole remnants
• Conservation of superhorizon curvature perturbations at one loop: Backreaction in the in-in formalism and Renormalization
• Untangling PBH overproduction in $w$-SIGWs generated by Pulsar Timing Arrays for MST-EFT of single field inflation
• Primordial Black Holes from Effective Field Theory of Stochastic Single Field Inflation at NNNLO
• Negative non-Gaussianity as a salvager for PBHs with PTAs in bounce
• Feasibility of Primordial Black Hole Remnants as Dark Matter in View of Hawking Radiation Recoil
• Generating large primordial fluctuations in single-field inflation for PBH formation
• Constraints on ultra-slow-roll inflation with the NANOGrav 15-Year Dataset