Holographic dark energy in the DGP model

Details Holographic dark energy in the DGP model Holographic dark energy in the DGP model

2011-09-09

arxiv.org/abs/1109.2090v1

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

Latex, 12 pages, 4 figures; Submitted to Phys. Lett. B

Scientific paper

The braneworld model proposed by Dvali, Gabadadze and Porrati leads to an accelerated universe without cosmological constant or other form of dark energy. Nevertheless, we have investigated the consequences of this model when an holo- graphic dark energy is included, taken the Hubble scale as IR cutoff. We have found that the holographic dark energy leads to an accelerated universe flat (de Sitter like expansion) for the two branch: {\ko} = \pm1 of the DGP model. Nevertheless, in universes with no null curvature the dark energy presents an EoS corresponding to a phantom fluid during the present era and evolving to a de Sitter like phase for future cosmic time. In the special case in which the holographic parameter c is equal to one we have found a sudden singularity in closed universes. In this case the expansion is decelerating. Manuscript

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