@article{ac8a72c286e64240ac4a88dc2da8a09e,
title = "Eternal inflation and swampland conjectures",
abstract = "We study if eternal inflation is realized while satisfying the recently proposed string swampland criteria concerning the range of scalar field excursion, |Δφ|<D·MP, and the potential gradient, |V|>c·V/MP, where D and c are constants of order unity and MP is the reduced Planck mass. We find that only the eternal inflation of chaotic type is possible for c∼O(0.01) and 1/D∼O(0.01) and that the Hubble parameter during the eternal inflation is parametrically close to the Planck scale and is in the range of 2πcHinf/MP<1/3.",
author = "Hiroki Matsui and Fuminobu Takahashi",
note = "Funding Information: F. T. thanks Prateek Agrawal for useful communications. F. T. is thankful for the hospitality of MIT Center for Theoretical Physics where this work was done. This work is partially supported by JSPS KAKENHI Grants No. JP15H05889 (F. T.), No. JP15K21733 (F. T.), No. JP17H02878 (F. T.), and No. JP17H02875 (H. M. and F. T.); by Leading Young Researcher Overseas Visit Program at Tohoku University (F. T.); and by World Premier International Research Center Initiative (WPI Initiative), MEXT, Japan (F. T.). ",
year = "2019",
month = jan,
day = "15",
doi = "10.1103/PhysRevD.99.023533",
language = "English",
volume = "99",
journal = "Physical Review D",
issn = "2470-0010",
publisher = "American Physical Society",
number = "2",
}