Dynamics of FRW Universes Sourced by Non-Linear Electrodynamics
Abstract
We apply the dynamical systems tools to study the (linear) dynamics of Friedmann-Robertson-Walker universes that are fuelled by non-linear electrodynamics. We focus, mainly, in two particular models. In the first model the cosmic evolution is fuelled by cold dark matter, a cosmological constant and a non-linear electrodynamics field. In the second case non-singular cosmology and late-time accelerated expansion are unified in a model where the Einstein's field equations are sourced only by cold dark matter and a non-linear electrodynamics field. It is shown that, in contrast to previous claims, the cosmological effects coming from the non-linear electrodynamics field are not as generic as though. In fact, critical points in the phase space that could be associated with non-linear electrodynamic effects are not found.
Cite
@article{arxiv.0905.1103,
title = {Dynamics of FRW Universes Sourced by Non-Linear Electrodynamics},
author = {Ricardo Garcia-Salcedo and Tame Gonzalez and Claudia Moreno and Israel Quiros},
journal= {arXiv preprint arXiv:0905.1103},
year = {2009}
}
Comments
8 pages, 10 figures, pdf file, tex file