Brane Cosmological Evolution With Bulk Matter
arXiv:hep-th/0609100 · doi:10.1016/j.physletb.2007.01.009
Abstract
We consider the cosmological evolution of a brane for general bulk matter content. In our setup the bulk pressure and the energy exchange densities are comparable to the brane energy density. Adopting a phenomenological fluid ansatz and generalizations of it, we derive a set of exact solutions of the Friedmann equation that exhibit accelerated expansion. We find that the effective equation of state parameter for the dark energy can exhibit w=-1 crossing without the presence of exotic matter.
11 Pages
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