
Open access
Date
2020-09-19Type
- Journal Article
Citations
Cited 16 times in
Web of Science
Cited 15 times in
Scopus
ETH Bibliography
yes
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Abstract
It has been suggested that low energy effective field theories should satisfy given conditions in order to be successfully embedded into string theory. In the case of a single canonically normalized scalar field this translates into conditions on its potential and the derivatives thereof. In this Letter we revisit small field hilltop models of eternal inflation including stochastic effects and study the compatibility of the swampland constraints with entropy considerations. We show that these stochastic inflation scenarios either violate entropy bounds or the swampland criterion on the slope of the scalar field potential. Furthermore, we illustrate that such models are faced with a graceful exit problem: any patch of space which exits the region of eternal inflation is either not large enough to explain the isotropy of the cosmic microwave background, or has a spectrum of fluctuations with an unacceptably large red tilt. Show more
Permanent link
https://doi.org/10.3929/ethz-b-000443290Publication status
publishedExternal links
Journal / series
The European Physical Journal CVolume
Pages / Article No.
Publisher
SpringerOrganisational unit
09662 - Heisenberg, Lavinia / Heisenberg, Lavinia
09662 - Heisenberg, Lavinia / Heisenberg, Lavinia
Funding
801781 - Modified Gravity on Trial (EC)
179740 - Multimessenger constraints of modified gravity (SNF)
More
Show all metadata
Citations
Cited 16 times in
Web of Science
Cited 15 times in
Scopus
ETH Bibliography
yes
Altmetrics