F(R) and Brans-Dicke theories and the Swampland

Michal Artymowski, Ido Ben-Dayan

Research output: Contribution to journalArticlepeer-review

15 Scopus citations

Abstract

We discuss the theoretical viability of f(R) and Brans-Dicke theories of gravity in light of the recent Swampland conjectures. We show that in the case of perfect fluid domination the swampland conjecture conditions may be easily satisfied and therefore we focus on the constraints in the vacuum theory. We derive the conditions for the swampland conjectures in f(R) and Brans-Dicke framework and find that a large portion of the parameter space is not allowed. Furthermore, we analyze particular f(R) models of inflation and dark energy and in their case, we set the allowed range of R.

Original languageEnglish
Article number042
JournalJournal of Cosmology and Astroparticle Physics
Volume2019
Issue number5
DOIs
StatePublished - 24 Apr 2019

Keywords

  • ination
  • modified gravity
  • string theory and cosmology

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