Reheating a multi-throat universe by brane motion

Understand

We propose a mechanism of reheating after inflation in multi-throat scenarios of warped extra dimensions.

• Validity of an effective field theory on the standard model (SM) brane requires that the position of the SM brane during inflation be different from the position after inflation.
• The latter is supposed to be near the tip of the SM throat but the former is not.
• After inflation, when the Hubble expansion rate becomes sufficiently low, the SM brane starts moving towards the tip and eventually oscillates.