Brane cosmological evolution with bulk matter |
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Authors: | C Bogdanos K Tamvakis |
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Institution: | Physics Department, University of Ioannina, Ioannina GR451 10, Greece |
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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. |
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