Slow-roll inflation without fine-tuning
arXiv:gr-qc/9911093 · doi:10.1016/S0370-2693(99)01362-3
Abstract
The slow-roll approximation is the usual starting point to study the constraints imposed on the inflaton potential parameters by the observational data. We show that, for a potential exhibiting at least two extrema and giving rise to a limited inflationary period, slow-roll does not have to be taken as an additional hypothesis and is in fact forced by the constraints on the number of e-foldings.
12 pages, 4 figures,RevTex style, to be published in Phys. Lett. B