Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2009-02-16
Class.Quant.Grav.27:065007,2010
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
15 pages, 7 figures, some discussions were simplified and new remarks were introduced
Scientific paper
10.1088/0264-9381/27/6/065007
The energy-momentum tensor coming from one-parameter effective Yang- Mills theory is here used to describe the matter-energy content of the homogeneous and isotropic Friedmann cosmology in its early stages. The behavior of all solutions is examined. Particularly, it is shown that only solutions corresponding to an open model allow the universe to evolve into an accelerated expansion. This result appears as a possible mechanism for an inflationary phase produced by a vector field. Further, depending on the value of some parameters characterizing the system, the resulting models are classified as singular or nonsingular.
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