Open AccessNo-go theorems for ekpyrosis from ten-dimensional supergravity
Author(s) -
Kunihito Uzawa
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1275/1/012058
Subject(s) - supergravity , dilaton , physics , scalar (mathematics) , scaling , scalar potential , theoretical physics , inflation (cosmology) , moduli , flux (metallurgy) , mathematical physics , mathematics , quantum mechanics , geometry , supersymmetry , materials science , metallurgy
We study whether the new ekpyrotic scenario can be embedded into tendimensional 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 obtain very strong constraints ruling out ekpyrosis from analysing 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).