Eur. Phys. J. C (2018) 78: 245
https://doi.org/10.1140/epjc/s10052-018-5741-0

Regular Article - Theoretical Physics

Reconstructing warm inflation

Instituto de Física, Pontificia Universidad Católica de Valparaíso, Casilla 4059, Valparaiso, Chile

^* e-mail: ramon.herrera@pucv.cl

Received: 16 January 2018
Accepted: 15 March 2018
Published online: 21 March 2018

Abstract

The reconstruction of a warm inflationary universe model from the scalar spectral index and the tensor to scalar ratio r(N) as a function of the number of e-folds N is studied. Under a general formalism we find the effective potential and the dissipative coefficient in terms of the cosmological parameters and r considering the weak and strong dissipative stages under the slow roll approximation. As a specific example, we study the attractors for the index given by and for the ratio , in order to reconstruct the model of warm inflation. Here, expressions for the effective potential and the dissipation coefficient are obtained.