Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2000-12-28
Int.J.Theor.Phys. 40 (2001) 2295
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
RevTex, 10 pages, 4 figures, To appear in the proceedings of the 5th Peyresq meeting
Scientific paper
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 portraits for the conformal coupling case are given. It is shown that the non-minimal coupling modifies drastically the dynamics of the universe. New cosmological behaviors are identified, including superinflation ($\dot{H}>0$), avoidance of big bang singularities through classical birth of the universe from empty Minkowski space, and spontaneous entry into and exit from inflation. The relevance of this model to the description of quintessence is discussed.
Brenig Leon
Faraoni Valerio
Figueiredo Annibal
Gunzig Edgard
Rocha Filho Tarcisio Marciano
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