Primordial perturbations from ultra-slow-roll single-field inflation with quantum loop effects

Abstract

It is known that the single-field inflation with a transient ultra-slow-roll phase can produce a large curvature perturbation at small scales for the formation of primordial black holes. In our previous work, we have considered quantum loop corrections to the curvature perturbation and found that the growth of these small-scale modes would affect the curvature perturbation at large scales probed by cosmic microwave background observation. In this work, we will further derive the constraints on the growing modes in the transition between the slow-roll and the ultra-slow-roll phases under the effect of the loop corrections. Our results would help clarify the recent controversy on whether or not the primordial-black-hole formation from the single-field inflation is ruled out at one-loop level.

28 pages, 14 figures

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Cited by in corpus (25)

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• Primordial non-Gaussianity from ultra slow-roll Galileon inflation
• Induced Gravitational Wave interpretation of PTA data: a complete study for general equation of state
• Numerical 1-loop correction from a potential yielding ultra-slow-roll dynamics
• Realisation of the ultra-slow roll phase in Galileon inflation and PBH overproduction
• Ultra-Slow-Roll Inflation on the Lattice I: Backreaction and Nonlinear Effects
• Loop contributions to the scalar power spectrum due to quartic order action in ultra slow roll inflation
• One-loop infrared rescattering by enhanced scalar fluctuations during inflation
• Large fluctuations and Primordial Black Holes
• Comparing sharp and smooth transitions of the second slow-roll parameter in single-field inflation
• Absence of one-loop effects on large scales from small scales in non-slow-roll dynamics II: Quartic interactions and consistency relations
• Primordial black hole compaction function from stochastic fluctuations in ultra-slow-roll inflation
• Proving the absence of large one-loop corrections to the power spectrum of curvature perturbations in transient ultra-slow-roll inflation within the path-integral approach
• Obviating PBH overproduction for SIGWs generated by Pulsar Timing Arrays in loop corrected EFT of bounce
• Absence of one-loop effects on large scales from small scales in non-slow-roll dynamics
• Quantum loop corrections in the modified gravity model of Starobinsky inflation with primordial black hole production
• 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
• Role of the counterterms in the conservation of superhorizon curvature perturbations at one loop
• Incorporating Backreaction in One-Loop Corrections in Ultra-Slow-Roll Inflation
• Ultra-Slow-Roll Inflation on the Lattice II: Nonperturbative Curvature Perturbation
• Constraining ultra slow roll inflation using cosmological datasets
• Dip and non-linearity in the curvature perturbation from inflation with a transient non-slow-roll stage
• Stochastic Inflation with Interacting Noises
• Effect of stochastic kicks on primordial black hole abundance and mass via the compaction function