Eternal inflation and swampland conjectures
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PhysRevD.99.023533.pdf
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152.88 KB
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Author(s)
Matsui, Hiroki
Takahashi, Fuminobu
Date Issued
January 2019
Journal
Physical Review D
Publisher
American Physical Society
Citation
Matsui, Hiroki and Takahashi, Fuminobu. "Eternal inflation and swampland conjectures." Physical Review D 99, 2 (January 2019): 023533
Version
Final published version
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·M[subscript P], and the potential gradient, |∇V|>c·V/M[subscript P], where D and c are constants of order unity and M[subscript P] 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 2πc≲H[subscript inf]/M[subscript P]< 1/√3.
MIT Department
Massachusetts Institute of Technology. Center for Theoretical Physics
Massachusetts Institute of Technology. Department of Physics
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Creative Commons Attribution
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DOI of Published Version
https://doi.org/10.1103/PhysRevD.99.023533
