Anisotropy in Born-Infeld brane cosmology

The accelerated expansion of the Universe together with its present day isotropy has posed an interesting challenge to the numerous model theories presented over the years to describe them. In this paper, we address the above questions in the context of a braneworld model where the Universe is filled with Born-Infeld matter. We show that in such a model, the Universe evolves from a highly anisotropic state to its present isotropic form, which has entered an accelerated expanding phase.

Figure 1

The anisotropy parameter in the cases: $\beta =\infty$ (dashed-dotted line), $\beta =1$ (dashed line), $\beta ={10}^{-5}$ (solid line).

Figure 2

The early time behavior of the deceleration parameter in the cases: $\beta =\infty$ (dashed-dotted line), $\beta =1$ (dashed line), $\beta ={10}^{-5}$ (solid).

Figure 3

The late time behavior of the deceleration parameter in the cases: $\beta =\infty$ (dashed-dotted line), $\beta =1$ (dashed line), $\beta ={10}^{-5}$ (solid).