Abstract
We extend -inflation which is a type of kinetically driven inflationary model under the standard inflationary scenario to a possible warm inflationary scenario. The dynamical equations of this warm -inflation model are obtained. We rewrite the slow-roll parameters which are different from the usual potential driven inflationary models and perform a linear stability analysis to give the proper slow-roll conditions in warm -inflation. Two cases, a power-law kinetic function and an exponential kinetic function, are studied, when the dissipative coefficient and , respectively. A proper number of e-folds is obtained in both concrete cases of warm -inflation. We find a constant dissipative coefficient () is not a workable choice for these two cases while the two cases with are self-consistent warm inflationary models.
- Received 7 September 2016
DOI:https://doi.org/10.1103/PhysRevD.94.103531
© 2016 American Physical Society