Generalized Chaplygin gas as geometrical dark energy
arXiv:0710.2666 · doi:10.1103/PhysRevD.76.104009
Abstract
The generalized Chaplygin gas provides an interesting candidate for the present accelerated expansion of the universe. We explore a geometrical explanation for the generalized Chaplygin gas within the context of brane world theories where matter fields are confined to the brane by means of the action of a confining potential. We obtain the modified Friedmann equations, deceleration parameter and age of the universe in this scenario and show that they are consistent with the present observational data.
11 pages, 3 figures, to appear in PRD
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