Ultra slow-roll inflation demystified

By Konstantinos Dimopoulos. 2017

144 citations recorded by the source corpus.

Ultra-slow-roll (USR) inflation is a new mode of inflation which corresponds to the occasions when the inflaton field must traverse an extremely flat part of the scalar potential, when the usual slow-roll (SR) fails. We investigate USR and obtain an estimate for how long it lasts, given the initial kinetic density of the inflaton. We also find that, if the initial kinetic density is small enough, USR can be avoided and the usual SR treatment is valid. This has important implications for inflection-point inflation.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/688294dc03e3b42fa124578c238e3815a196e04d

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In Astronomy and Astrophysics

1. H. Di
2. Y. Gong
3. M. Setare
4. Emmanuel N. Saridakis
5. Xin Zhang
6. Miao Li
7. Shuang Wang
8. Yi Wang

Citations in the corpus

• Primordial black holes and second order gravitational waves from ultra-slow-roll inflation (2017, background): “6) may overestimate the number of e-folds because the acceleration of the inflaton is locked by the friction term [56, 57].”