Swampland, axions, and minimal warm inflation

Suratna Das (Department of Physics, Indian Institute of Technology, Kanpur, Kanpur 208016, India) ; Gaurav Goswami (School of Engineering and Applied Science, Ahmedabad University, Ahmedabad 380009, India) ; Chethan Krishnan (Center for High Energy Physics, Indian Institute of Science, Bangalore 560012, India)

Warm inflation has been noted previously as a possible way to implement inflationary models compatible with the dS swampland bounds. But often in these discussions, the heat bath dynamics are kept largely unspecified. We point out that the recently introduced minimal warm inflation [K. V. Berghaus, P. W. Graham, and D. E. Kaplan, J. Cosmol. Astropart. Phys. 03 (2020) 034], where an axionic coupling of the inflaton leads to an explicit model for the thermal bath, yields models of inflation that can easily fit cosmological observations while satisfying de Sitter swampland bounds, as well as the swampland distance bound and trans-Planckian censorship.

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Published on:
22 May 2020
Publisher:
APS
Published in:
Physical Review D , Volume 101 (2020)
Issue 10
DOI:
https://doi.org/10.1103/PhysRevD.101.103529
arXiv:
1911.00323
Copyrights:
Published by the American Physical Society
Licence:
CC-BY-4.0

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