1-5 July 2019
The University of Manchester
Europe/London timezone
- pascos2019@manchester.ac.uk
- +44 (0)161 275 4171
The Local Organising Committee
No-Go theorems for ekpyrosis from ten-dimensional supergravity
Presented by Dr. Kunihito UZAWA
on
2 Jul 2019
from
15:10
to
15:30
Track: String Theory and Alternatives
Content
In this talk, we present whether the new ekpyrotic scenario can be embedded into ten-dimensional supergravity. We use that the scalar potential obtained from flux compactifications of type II supergravity with sources has a universal scaling with respect to the dilaton and the volume mode. Similar to the investigation of inflationary models, we find very strong constraints ruling out ekpyrosis from analyzing the fast-roll conditions. We conclude that flux compactifications tend to provide potentials that are neither too flat and positive (inflation) nor too steep and negative (ekpyrosis).
Place
Location: Schuster
Room: Annex: Bell Burnell Lecture Theatre