837 citations · 8.3k across the 83 of their papers we have counts for
8 papers · 1 filter
Non-Gaussianity from Broken Symmetries
Edward W. Kolb, Antonio Riotto, Alberto Vallinotto
Recently we studied inflation models in which the inflaton potential is characterized by an underlying approximate global symmetry. In the first work we pointed out that in such a…
Comments on Long-Wavelength Backreaction and Dark Energy
E. W. Kolb, S. Matarrese, A. Riotto
In this brief note we comment on a recent attempt by Martineau and Brandenberger (astro-ph/0510523) to explain the acceleration of the Universe using the back-reaction of long-wave…
Comments on Backreaction and Cosmic Acceleration
E. W. Kolb, S. Matarrese, A. Riotto
In this brief WEB note we comment on recent papers related to our paper "On Acceleration Without Dark Energy".
Instant nonthermal leptogenesis
Eun-Joo Ahn, Edward W. Kolb
We propose an economical model of nonthermal leptogenesis following inflation during ``instant'' preheating. The model involves only the inflaton field, the standard model Higgs, a…
Post-inflation increase of the cosmological tensor-to-scalar perturbation ratio
N. Bartolo, Edward W. Kolb, A. Riotto
We investigate the possibility that the amplitude of scalar density perturbations may be damped after inflation. This would imply that CMB anisotropies do not uniquely fix the ampl…
On cosmic acceleration without dark energy
E. W. Kolb, S. Matarrese, A. Riotto
We elaborate on the proposal that the observed acceleration of the Universe is the result of the backreaction of cosmological perturbations, rather than the effect of a negative-pr…