New perspectives on constant-roll inflation [CEA]

http://arxiv.org/abs/1709.03527


We study constant-roll inflation using the $\beta$-function formalism. We show that the constant rate of the inflaton roll is translated into a first order differential equation for the $\beta$-function which can be solved easily. The solutions to this equation correspond to the usual constant-roll models. We then construct, by perturbing these exact solutions, more general classes of models that satisfy the constant-roll equation asymptotically. In the case of an asymptotic power law solution, these corrections naturally provide an end to the inflationary phase. Interestingly, while from a theoretical point of view (in particular in terms of the holographic interpretation) these models are intrinsically different from standard slow-roll inflation, they may have phenomenological predictions in good agreement with present cosmological data.

Read this paper on arXiv…

F. Cicciarella, J. Mabillard and M. Pieroni
Wed, 13 Sep 17
14/72

Comments: 26 pages, 4 figures