Dynamics of FRW Universes Sourced by Non-Linear Electrodynamics

Details Dynamics of FRW Universes Sourced by Non-Linear Electrodynamics Dynamics of FRW Universes Sourced by Non-Linear Electrodynamics

2009-05-07

arxiv.org/abs/0905.1103v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

8 pages, 10 figures, pdf file, tex file

Scientific paper

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.

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