Dynamics of FRW Universes Sourced by Non-Linear Electrodynamics

Garcia-Salcedo, Ricardo; Gonzalez, Tame; Moreno, Claudia; Quiros, Israel

Dynamics of FRW Universes Sourced by Non-Linear Electrodynamics

Authors

Garcia-Salcedo, Ricardo

Gonzalez, Tame

Moreno, Claudia

Quiros, Israel

Description

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.
8 pages, 10 figures, pdf file, tex file