57 citations · 207 across the 7 of their papers we have counts for
7 papers
The effect of multiple features on the power spectrum in two-field inflation
K. Boutivas, I. Dalianis, G. P. Kodaxis +1
We extend our previous work on the enhancement of the curvature spectrum during inflation to the two-field case. We identify the slow-roll parameter as the quantity that can tr…
Spectrum oscillations from features in the potential of single-field inflation
I. Dalianis, G. P. Kodaxis, I. D. Stamou +2
We study single-field inflationary models with steep step-like features in the potential that lead to the temporary violation of the slow-roll conditions during the evolution of th…
Features of the inflaton potential and the power spectrum of cosmological perturbations
K. Kefala, G. P. Kodaxis, I. D. Stamou +1
We discuss features of the inflaton potential that can lead to a strong enhancement of the power spectrum of curvature perturbations. We show that a steep decrease of the potential…
Spectrum of Cosmological Perturbations from Multiple-Stage Inflation
Mairi Sakellariadou, Nikos Tetradis
Within the context of supersymmetric hybrid inflation, we study a multiple-stage inflationary scenario that can generate a primordial spectrum of adiabatic density perturbations wi…
Field Evolution leading to hybrid inflation
Z. Berezhiani, D. Comelli, N. Tetradis
In general the onset of hybrid inflation requires an extremely homogeneous field configuration at the end of Planck era. The field ϕorthogonal to the inflaton σmust be zero with hi…
Two-Stage Inflation in Supergravity
G. Lazarides, N. Tetradis
We investigate the viability of a two-stage inflationary scenario in the context of supergravity, so as to resolve the problem of initial conditions for hybrid inflation. We allow…