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Abstract
The inflationary scenario is nowadays the most natural and simple way to solve the problems of the standard Friedmann-Lemaître-Robertson-Walker cosmology. Generally, inflation is driven by models of gravity minimally coupled to a scalar field ϕ rolling on a suitable potential V (ϕ). We discuss a particular model presenting two scenarios: the vacuum universe and the matter-filled universe, in order to find exact general isotropic and homogeneous cosmological solutions displaying an inflationary behavior at early times and a power-law expansion at late times.
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Details
1 INAF-Osservatorio Astronomico di Cagliari, Via della Scienza 5, 09047 Selargius (CA), Italy
2 Dipartimento di Matematica, Università di Cagliari, Viale Merello 92, 09123 Cagliari, Italy