Astronomy and Astrophysics – Astrophysics – General Relativity and Quantum Cosmology
Scientific paper
2009-12-27
JCAP 1002:027,2010
Astronomy and Astrophysics
Astrophysics
General Relativity and Quantum Cosmology
12 pages, Revtex, 12 eps figures. Several new references added. Minor changes in the main text. Discussion improved
Scientific paper
10.1088/1475-7516/2010/02/027
We apply the dynamical systems tools to study the asymptotic properties of a cosmological model based on a non-linear modification of General Relativity in which the standard Einstein-Hilbert action is replaced by one of Dirac-Born-Infeld type. It is shown that the dynamics of this model is extremely rich: there are found equilibrium points in the phase space that can be associated with matter-dominated, matter-curvature scaling, de Sitter, and even phantom-like solutions. Depending on the value of the overall parameters the dynamics in phase space can show multi-attractor structure into the future (multiple future attractors may co-exist). This is a consequence of bifurcations in control parameter space, showing strong dependence of the model's dynamical properties on the free parameters. Contrary to what is expected from non-linear modifications of general relativity of this kind, removal of the initial spacetime singularity is not a generic feature of the corresponding cosmological model. Instead, the starting point of the cosmic dynamics -- the past attractor in the phase space -- is a state of infinitely large value of the Hubble rate squared, usually associated with the big bang singularity.
García-Salcedo Ricardo
Gonzalez Tame
Leyva Yoelsy
Moreno Claudia
Napoles Yunelsy
No associations
LandOfFree
Asymptotic Properties of a Supposedly Regular (Dirac-Born-Infeld) Modification of General Relativity does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Asymptotic Properties of a Supposedly Regular (Dirac-Born-Infeld) Modification of General Relativity, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Asymptotic Properties of a Supposedly Regular (Dirac-Born-Infeld) Modification of General Relativity will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-567517