Remarks on some vacuum solutions of scalar-tensor cosmological models
arXiv:hep-th/0312124 · doi:10.1590/S0103-97332004000300032
Abstract
We present a class of exact vacuum solutions corresponding to de Sitter and warm inflation models in the framework of scalar-tensor cosmologies. We show that in both cases the field equations reduce to planar dynamical systems with constraints. Then, we carry out a qualitative analysis of the models by examining the phase diagrams of the solutions near the equilibrium points.
12 pages, 4 figures. To be published in the Brazilian Journal of Physics