par Gunzig, Edgard 
;Brenig, Léon ;Figueiredo, Annibal;Rocha Filho, Tarcísio T.M.
Référence Modern physics letters A, 15, 21, page (1363-1368)
Publication Publié, 2000-07
;Brenig, Léon ;Figueiredo, Annibal;Rocha Filho, Tarcísio T.M.Référence Modern physics letters A, 15, 21, page (1363-1368)
Publication Publié, 2000-07
Article révisé par les pairs
| Résumé : | A general dynamical system approach to classical self-consistent scalar field cosmology is presented in the framework of spatially flat FLRW space-times, for arbitrary potentials and arbitrary non-minimal coupling. We show that these universes cannot undergo chaotic behaviors, thus suggesting a possible new role of inflation in cosmology. An unexpectedly involved topology of the phase-portrait of the cosmological dynamics is exhibited: Dynamically forbidden regions, playing a crucial dynamical role, appear. A new exact critical solution, a heteroclinic orbit, connects two de Sitter inflationary regimes. We suggest a novel intriguing semiclassical cosmogenesis scenario in which the quantized scalar field could tunnel through the classically forbidden region, from the Minkowski space-time towards the nearest classically allowed solution: The critical one. |
