Nonsingular and accelerated expanding universe from effective Yang-Mills theory

Details Nonsingular and accelerated expanding universe from effective Yang-Mills theory Nonsingular and accelerated expanding universe from effective Yang-Mills theory

2009-02-16

arxiv.org/abs/0902.2672v2

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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