REVIEW 5 cited by
Amplitude of Perturbations from Inflation
Not yet reviewed by Pith; the record is open.
This paper has not been read by Pith yet. Machine review is queued; the pith claim, tier, and objections will appear here once it completes.
SPECIMEN: schema-true, not a live event
T0 review · schema-true
One-sentence machine reading of the paper's core claim.
pith:XXXXXXXX · record.json · timestamp
read the original abstract
The observed power spectrum of the cosmic microwave background (CMB) is consistent with inflationary cosmology, which predicts a nearly scale-invariant power spectrum of quantum fluctuations of the inflaton field as they exit the Hubble horizon during inflation. Here we report a very significant correction (of several orders of magnitude) to the predicted amplitude of the power spectrum. This correction does not alter the near scale-invariance of the spectrum, but is crucial for testing predictions of the Hubble parameter during inflation against the observed amplitude of the CMB power spectrum. This novel correction appears because, as we show, the subtractions that renormalize the short-wavelength ultraviolet divergences of the inflaton two-point function have a significant effect on the amplitude of that two-point function at the longer wavelengths characteristic of the Hubble horizon. Earlier conclusions in the literature that certain theories (such as grand unified theories) implied perturbations that were too large by several orders of magnitude will have to be reconsidered in light of the present result.
Forward citations
Cited by 5 Pith papers
-
Primary gravitational waves at high frequencies II: Emergence of the exponential cut-off in the power spectrum
For infinitely differentiable effective potentials describing the post-inflation transition, the regularized power spectrum of primary gravitational waves exhibits exponential suppression at small scales.
-
Renormalization effects fade away during inflation
Inflation dynamically suppresses the renormalization sector, rendering the observable primordial spectrum insensitive to renormalization ambiguities.
-
Primary gravitational waves at high frequencies I: Origin of suppression in the power spectrum
Adiabatic regularization combined with smoothed transitions suppresses the high-frequency oscillations in the power spectrum of primary gravitational waves about a zero mean.
-
Vacuum Polarization, Geodesic Equation and Sachs-Wolfe Effect
Charged-scalar vacuum polarization makes photon paths timelike and yields frequency-dependent Sachs-Wolfe corrections, giving a CMB mu-distortion and power-spectrum modifications whose size depends on the scalar mass ...
-
The Cosmological Constant Problem: An Accessible Introduction
Pedagogical review illustrating vacuum energy calculations for a scalar field and explaining the persistent cosmological constant mismatch plus conceptual issues in expanding universes.
Discussion (0). Continue with ORCID to comment.