Regular collision of dilatonic inflating branes

Emily Leeper, Kazuya Koyama, Roy Maartens
2006 Physical Review D  
We demonstrate that a two brane system with a bulk scalar field driving power-law inflation on the branes has an instability in the radion. We solve for the resulting trajectory of the brane, and find that the instability can lead to collision. Brane quantities such as the scale factor are shown to be regular at this collision. In addition we describe the system using a low energy expansion. The low energy expansion accurately reproduces the known exact solution, but also identifies an
more » ... ve solution for the bulk metric and brane trajectory.
doi:10.1103/physrevd.73.043506 fatcat:jmhyp7xzoba6lj3vxwnobqjtiq