58 citations · 275 across the 8 of their papers we have counts for
8 papers
Compactification driven Hilltop Inflation in Einstein-Yang-Mills
Eoin Ó Colgáin, Ignacio Zaballa
Starting from Einstein-Yang-Mills in higher dimensions with an instanton on a compact sphere, we dimensionally reduce to find an effective four-dimensional action describing "hillt…
Boosted perturbations at the end of inflation
Ignacio Zaballa, Misao Sasaki
We study the effect on the primordial cosmological perturbations of a sharp transition from inflationary to a radiation and matter dominated epoch respectively. We assume that the…
Dynamical Compactification and Inflation in Einstein-Yang-Mills Theory with Higher Derivative Coupling
Hironobu Kihara, Muneto Nitta, Misao Sasaki +2
We study cosmology of the Einstein-Yang-Mills theory in ten dimensions with a quartic term in the Yang-Mills field strength. We obtain analytically a class of cosmological solution…
Gravitational reheating in quintessential inflation
E. J. Chun, S. Scopel, I. Zaballa
We provide a detailed study of gravitational reheating in quintessential inflation generalizing previous analyses only available for the standard case when inflation is followed by…
Constraints on the primordial curvature perturbation from primordial black holes
Ignacio Zaballa, Anne M. Green, Karim A. Malik +1
We calculate the constraints on the primordial curvature perturbation at the end of inflation from the present day abundance of Primordial Black Holes (PBHs), as a function of the…
Higher order contributions to the primordial non-gaussianity
Ignacio Zaballa, Yeinzon Rodriguez, David H. Lyth
In this paper we calculate additional contributions to that part of the non-Gaussianity of the curvature perturbation, which come from the three-point correlator of the field pertu…