Is asymptotically safe inflation eternal?

  title={Is asymptotically safe inflation eternal?},
  author={John T. Chojnacki and J. Krajecka and Jan Henryk Kwapisz and Oskar Slowik and A. Strag},
  journal={Journal of Cosmology and Astroparticle Physics},
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… 

Dimensional reduction and (Anti) de Sitter bounds

Dimensional reduction has proven to be a surprisingly powerful tool for delineating the boundary between the string landscape and the swampland. Bounds from the Weak Gravity Conjecture and the

Analytic extensions of Starobinsky model of inflation

We study several extensions of the Starobinsky model of inflation, which obey all observational constraints on the inflationary parameters, by demanding that both the inflaton scalar potential in the

Higher-order extension of Starobinsky inflation: Initial conditions, slow-roll regime, and reheating phase

The most current observational data corroborate the Starobinsky model as one of the strongest candidates in the description of an inflationary regime. Motivated by such success, extensions of the

Asymptotic Safety: Swampland or Wonderland?

We investigate the consequences of combining swampland conjectures with the requirement of asymptotic safety. To this end, we explore the infrared regime of asymptotically safe gravity in the

A novel way of constraining the α-attractor chaotic inflation through Planck data

Defining a scale of k-modes of the quantum fluctuations during inflation through the dynamical horizon crossing condition k = aH we go from the physical t variable to k variable and solve the

Finite action principle and Hořava-Lifshitz gravity: Early universe, black holes, and wormholes

This work elaborate on the finite action in the framework of Horava-Lifshitz gravity, and shows that the beginning of the universe is flat and homogeneous, proving that the Finite Action Principle is not model-sensitive.



Eternal inflation, entropy bounds and the swampland

This Letter revisits small field hilltop models of eternal inflation including stochastic effects and studies the compatibility of the swampland constraints with entropy considerations, showing that these stoChastic inflation scenarios either violate entropy bounds or the sw swimpland criterion on the slope of the scalar field potential.

Eternal inflation in swampy landscapes

The much discussed swampland conjectures suggest significant constraints on the properties of string theory landscape and on the nature of the multiverse that this landscape can support. The

Eternal inflation and the quantum birth of cosmic structure

We consider the eternal inflation scenario of the slow-roll/chaotic type with the additional element of an objective collapse of the wave function. The incorporation of this new agent to the

Eternal inflation in light of Wheeler-DeWitt equation

  • M. Seo
  • Physics
    Journal of Cosmology and Astroparticle Physics
  • 2020
The Wheeler-DeWitt equation provides the probability distribution for the curvature perturbation, the gauge invariant quantum fluctuation of the inflaton. From this, we can find a tower of power

The string swampland constraints require multi-field inflation

An important unsolved problem that affects practically all attempts to connect string theory to cosmology and phenomenology is how to distinguish effective field theories belonging to the string

Eternal inflation and its implications

I summarize the arguments that strongly suggest that our universe is the product of inflation. The mechanisms that lead to eternal inflation in both new and chaotic models are described. Although the

Inflation in an effective gravitational model and asymptotic safety

We consider an inflationary model motivated by quantum effects of gravitational and matter fields near the Planck scale. Our Lagrangian is a resummed version of the effective Lagrangian recently

Cycles in the Multiverse

Eternal inflation is a seemingly generic consequence of theories that give rise to accelerated expansion of the universe and possess multiple vacuum states. Making predictions in an eternally

Preheating in an Asymptotically Safe Quantum Field Theory

We consider reheating in a class of asymptotically safe quantum field theories recently studied in \cite{Litim:2014uca, Litim:2015iea}. These theories allow for an inflationary phase in the very

Asymptotic safety, the Higgs boson mass, and beyond the standard model physics

There are many hints that gravity is asymptotically safe. The inclusion of gravitational corrections can result in the ultraviolet fundamental Standard Model and constrain the Higgs mass to take the