Authors: Aaron Berndsen James E Lidsey John Ward
Publish Date: 2010/01/09
Volume: 2010, Issue: 1, Pages: 25-
Abstract
We reconsider a string theoretic inflationary model where inflation is driven by n multiple coincident D3branes in the finite n limit We show that the finite n action can be continued to the limit of large n where it converges to the action for a wrapped D5brane with n units of U1 flux This provides an important consistency check of the scenario and allows for more control over certain backreaction effects We determine the most general form of the action for a specific subclass of models and examine the nonrelativistic limits of the theory where the branes move at speeds much less than the speed of light The nonAbelian nature of the worldvolume theory implies that the inflaton field is matrix valued and this results in modifications to the slowroll parameters and Hubbleflow equations A specific model of inflation is investigated where the branes move out of an AdS throat and observational constraints are employed to place bounds on the background fluxes
Keywords: