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Superinflation, quintessence, and the avoidance of the initial singularity
A. Saa, E. Gunzig, L. Brenig +3
We consider the dynamics of a spatially flat universe dominated by a self-interacting nonminimally coupled scalar field. The structure of the phase space and complete phase portrai…
A crucial ingredient of inflation
Valerio Faraoni
Nonminimal coupling of the inflaton field to the Ricci curvature of spacetime is generally unavoidable, and the paradigm of inflation should be generalized by including the corresp…
A new solution for inflation
Valerio Faraoni
Many pedagogical introductions of cosmological inflation are effective due to the simplicity of the relevant equations. Here an analytic solution of the cosmological equations is p…
Generalized slow-roll inflation
Valerio Faraoni
The slow-roll approximation to inflation is ultimately justified by the presence of inflationary attractors for the orbits of the solutions of the dynamical equations in phase spac…
Inflation and quintessence with nonminimal coupling
Valerio Faraoni
The nonminimal coupling (NMC) of the scalar field to the Ricci curvature is unavoidable in many cosmological scenarios. Inflation and quintessence models based on nonminimally coup…