Models of inflation liberated by the curvaton hypothesis

Dimopoulos, Konstantinos and Lyth, David H. (2004) Models of inflation liberated by the curvaton hypothesis. Physical Review D, 69 (12): 123509. ISSN 1550-7998

Abstract

It is usually supposed that inflation is of the slow-roll variety and that the inflaton generates the primordial curvature perturbation. According to the curvaton hypothesis, inflation need not be slow-roll, and if it is, the inflaton generates a negligible curvature perturbation. We find that the construction of slow-roll inflation models becomes much easier under this hypothesis. Also, thermal inflation followed by fast-roll becomes viable, with no slow-roll inflation at all.