Trans-Planckian censorship and other swampland bothers addressed in warm inflation

Arjun Berera (School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom) ; Jaime R. Calderón (School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom)

The implications of the recently proposed trans-Planckian censorship conjecture (TCC) are analyzed in the context of warm inflation. It is found that for a single-stage accelerated expansion the constraints imposed by the censorship are roughly the same as for cold inflation. Next, we study how a two-stage inflationary expansion with an intermediate radiation-dominated era can alleviate the bounds imposed by the censorship. For a demonstrative toy model we found r<1023, but can be r<105 for a weaker form of TCC for the later stages of expansion, while still satisfying the other swampland conditions.

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      "source": "APS", 
      "value": "The implications of the recently proposed trans-Planckian censorship conjecture (TCC) are analyzed in the context of warm inflation. It is found that for a single-stage accelerated expansion the constraints imposed by the censorship are roughly the same as for cold inflation. Next, we study how a two-stage inflationary expansion with an intermediate radiation-dominated era can alleviate the bounds imposed by the censorship. For a demonstrative toy model we found <math><mrow><mi>r</mi><mo>&lt;</mo><msup><mrow><mn>10</mn></mrow><mrow><mo>\u2212</mo><mn>23</mn></mrow></msup></mrow></math>, but can be <math><mi>r</mi><mo>&lt;</mo><msup><mn>10</mn><mrow><mo>\u2212</mo><mn>5</mn></mrow></msup></math> for a weaker form of TCC for the later stages of expansion, while still satisfying the other swampland conditions."
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Published on:
18 December 2019
Publisher:
APS
Published in:
Physical Review D , Volume 100 (2019)
Issue 12
DOI:
https://doi.org/10.1103/PhysRevD.100.123530
arXiv:
1910.10516
Copyrights:
Published by the American Physical Society
Licence:
CC-BY-4.0

Fulltext files: