Holographic dark energy in Brans-Dicke cosmology with Granda-Oliveros cut-off

Details Holographic dark energy in Brans-Dicke cosmology with Granda-Oliveros cut-off Holographic dark energy in Brans-Dicke cosmology with Granda-Oliveros cut-off

2010-06-28

arxiv.org/abs/1006.5365v2

Int. J. Theor. Phys, 2012, Volume 51, Number 2, Pages 604-61

Physics

General Physics

10 pages, accepted for publication in IJTP

Scientific paper

10.1007/s10773-011-0940-6

Motivated by the recent works of one of us [1,2] we study the holographic dark energy in Brans-Dicke gravity with the Granda-Oliveros cut-off proposed recently in literature. We find out that when the present model is combined with Brans-Dicke field the transition from normal state where $w_D >-1 $ to the phantom regime where $w_D <-1 $ for the equation of state of dark energy can be more easily achieved for than when resort to the Einstein field equations is made. Furthermore, the phantom crossing is more easily achieved when the matter and the holographic dark energy undergo an exotic interaction. We also calculate some relevant cosmological parameters and their evolution.

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