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No-go theorems for ekpyrosis from ten-dimensional supergravity

  • Kunihito UzawaEmail author
Open Access
Regular Article - Theoretical Physics
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Abstract

In this note we investigate 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 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).

Keywords

Strings and branes phenomenology 
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Notes

Open Access

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Copyright information

© The Author(s) 2018

Authors and Affiliations

  1. 1.Department of Physics, School of Science and TechnologyKwansei Gakuin UniversitySandaJapan

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