Speaker
Mr
Benedict Harling
(Institute for Theoretical Physics, Heidelberg)
Description
Strongly warped regions, also known as throats, are a common feature of the type IIB string
theory landscape. If one of the throats is heated during cosmological evolution, the energy is
subsequently transferred to other throats or to massless fields in the unwarped bulk of the
Calabi-Yau orientifold. This energy transfer proceeds either by Hawking radiation from the
black hole horizon in the heated throat or, at later times, by the decay of throat-localized
Kaluza-Klein states. In both cases, we calculate in a 10d setup the energy transfer rate
(respectively decay rate) as a function of the AdS scales of the throats and of their relative
distance . Compared to existing results based on 5d models, we find a significant
suppression of the energy transfer rates if the size of the embedding Calabi-Yau orientifold is
larger than the AdS radii of the throats. In particular, this is relevant for the analysis of
reheating after brane-antibrane inflation. Our calculation employs the dual gauge theory
picture in which each throat is described by a strongly coupled 4d gauge theory, the degrees
of freedom of which are localized at a certain position in the compact space.
Authors
Prof.
Arthur Hebecker
(Institute for Theoretical Physics, Heidelberg)
Mr
Benedict Harling
(Institute for Theoretical Physics, Heidelberg)
Dr
Tatsuya Noguchi
(Institute for Theoretical Physics, Heidelberg)
