Eternal inflation and swampland conjectures
Author(s)
Matsui, Hiroki; Takahashi, Fuminobu
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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.
Date issued
2019-01Department
Massachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of PhysicsJournal
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
ISSN
2470-0010
2470-0029