Primordial black holes and gravitational waves from resonant amplification during inflation

Abstract

We present a new realization of the resonant production of primordial black holes as well as gravitational waves in a two-stage inflation model consisting of a scalar field ϕwith an axion-monodromy-like periodic structure in the potential that governs the first stage and another field χwith a hilltop-like potential that dominates the second stage. The parametric resonance seeded by the periodic structure at the first stage amplifies the perturbations of both fields inside the Hubble radius. While the evolution of the background trajectory experiences a turn as the oscillatory barrier height increases, the amplified perturbations of χremain as they are and contribute to the final curvature perturbation. It turns out that the primordial power spectrum displays a significant resonant peak on small scales, which can lead to an abundant production of primordial black holes. Furthermore, gravitational waves are also generated from the resonantly enhanced field perturbations during inflation, the amplitude of which may be constrained by future gravitational wave interferometers.

14 pages, 8 figures

References in corpus (10)

• Laser Interferometer Space Antenna
• Primordial Black Holes as Dark Matter
• Monodromy in the CMB: Gravity Waves and String Inflation
• Gravitational Wave Spectrum Induced by Primordial Scalar Perturbations
• The cosmological gravitational wave background from primordial density perturbations
• Gravitational Wave signatures of inflationary models from Primordial Black Hole Dark Matter
• Gravitational Waves Induced by Scalar Perturbations with a Lognormal Peak
• Constraints on the induced gravitational wave background from primordial black holes
• Black hole formation in a contracting universe
• Conservation of the nonlinear curvature perturbation in generic single-field inflation

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• Primordial black holes and gravitational waves in teleparallel Gravity
• Scalar induced gravitational waves review
• Quantum-Ordering Ambiguities in Weak Chern-Simons 4D Gravity and Metastability of the Condensate-Induced Inflation
• A narrow-band parameterization for the stochastic gravitational wave background