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

Arjun Berera, Jaime R. Calderón

Research output: Contribution to journalArticlepeer-review


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<10−23, but can be r<10−5 for a weaker form of TCC for the later stages of expansion, while still satisfying the other swampland conditions.
Original languageEnglish
Article number123530
Number of pages11
JournalPhysical Review D - Particles, Fields, Gravitation and Cosmology
Issue number12
Publication statusPublished - 18 Dec 2019


  • hep-ph
  • astro-ph.CO
  • gr-qc
  • hep-th


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