English

Is asymptotically safe inflation eternal?

General Relativity and Quantum Cosmology 2021-05-03 v5 High Energy Physics - Phenomenology High Energy Physics - Theory

Abstract

Recently, based on swampland considerations in string theory, the (no) eternal inflation principle has been put forward. The natural question arises whether similar conditions hold in other approaches to quantum gravity. In this article, the asymptotic safety hypothesis is considered in the context of eternal inflation. As exemplary inflationary models the SU(N) Yang-Mills in the Veneziano limit and various RG-improvements of the gravitational action are studied. The existence of UV fixed point generically flattens the potential and our findings suggest no tension between eternal inflation and asymptotic safety, both in the matter and gravitational sector in contradistinction to string theory. Moreover, the eternal inflation cannot take place in the range of applicability of effective field quantum gravity theory. We employ the analytical relations for eternal inflation to some of the models with single minima, such as Starobinsky inflation, alpha-attractors, or the RG-improved models and verify them with the massive numerical simulations. The validity of these constraints is also discussed for a multi-minima model.

Keywords

Cite

@article{arxiv.2101.00866,
  title  = {Is asymptotically safe inflation eternal?},
  author = {Jan Chojnacki and Julia Krajecka and Jan H. Kwapisz and Oskar Słowik and Artur Strąg},
  journal= {arXiv preprint arXiv:2101.00866},
  year   = {2021}
}

Comments

23 p., 8 fig, minor corrections in typography, accepted in JCAP

R2 v1 2026-06-23T21:44:37.888Z