Bridging geometries and potentials in DBI cosmologies

Abstract

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.

7 pages, 3 figures, revtex

References in corpus (4)

• A Microscopic Limit on Gravitational Waves from D-brane Inflation
• Primordial Non-Gaussianity and Gravitational Waves: Observational Tests of Brane Inflation in String Theory
• Brane inflation and reheating
• A Consistency Relation for Power Law Inflation in DBI models

Cited by in corpus (2)

• Inflationary potentials in DBI models
• Reconstructing Single Field Inflationary Actions From CMBR Data