de Sitter swampland bound in the Dirac-Born-Infeld inflation model

Seo, Min-Seok (Department of Physics, Chung-Ang University, Seoul 06974, Korea)

07 May 2019

Abstract: We study the de Sitter (dS) swampland conjecture in the Dirac-Born-Infeld (DBI) inflation model. We obtain the dS swampland bound for the relativistic regime using Bousso’s entropy bound argument and proper distance. It restricts mPlV/V by some positive constant depending on warping and the field range. In the specific case of the DBI model driven by the quadratic potential, the model-dependent backreaction argument is interpreted as a natural bound for the slow-roll parameter. This shows that quasi-dS spacetime in the DBI model is a result of tuning.


Published in: Physical Review D 99 (2019)
Published by: APS
DOI: 10.1103/PhysRevD.99.106004
arXiv: 1812.07670
License: CC-BY-4.0



Back to search

Fulltext:
Download fulltextXML Download fulltextPDF