Bridging geometries and potentials in DBI cosmologies

Details Bridging geometries and potentials in DBI cosmologies Bridging geometries and potentials in DBI cosmologies

2007-11-05

arxiv.org/abs/0711.0712v1

Gen.Rel.Grav.40:2543-2555,2008

Physics

High Energy Physics

High Energy Physics - Theory

7 pages, 3 figures, revtex

Scientific paper

10.1007/s10714-008-0637-1

We investigate the link between the warp function and the potential in DBI cosmologies in connection with the possibility they represent power-law solutions. A prescription is given to take advantage of the known result that given a warp factor there is always a choice of potential resulting in a constant ratio between pressure and energy density. The method is illustrated with examples with interesting models for either the warp factor or the potential. We complete this investigation by giving a recipe to exploit symmetries in order to generate new solutions from existing ones; this method can be applied, for instance, to the power-law cosmologies obtained using our prescription.

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