4 papers
A scalar field governed cosmological model from noncompact Kaluza-Klein theory
Jose Edgar Madriz Aguilar, Mauricio Bellini, Francisco Astorga Saenz
This paper is a review of a recently introduced cosmological model from a noncompact Kaluza-Klein theory for a single scalar field minimally coupled to gravity. We obtain that the…
Fresh inflation with nonminimally coupled inflaton field
Mauricio Bellini
I study a fresh inflationary model with a scalar field nonminimally coupled to gravity. An example is examined. I find that, as larger is the value of (the power of the scale f…
Primordial fluctuations of the metric in the warm inflation scenario
Mauricio Bellini
I consider a semiclassical expansion of the scalar field in the warm inflation scenario. I study the evolution for the fluctuations of the metric around the Friedmann-Robertson-Wal…
Perturbations of the metric induced by back - reaction in the warm inflation scenario
Mauricio Bellini
A second-order expansion for the quantum fluctuations of the matter field was considered in the framemork of the warm inflation scenario. The friction and Hubble parameters were ex…