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Effective universality in quantum gravity

by Astrid Eichhorn, Peter Labus, Jan M. Pawlowski, Manuel Reichert

Submission summary

As Contributors: Manuel Reichert
Arxiv Link: https://arxiv.org/abs/1804.00012v2 (pdf)
Date accepted: 2018-09-17
Date submitted: 2018-07-25 02:00
Submitted by: Reichert, Manuel
Submitted to: SciPost Physics
Academic field: Physics
Specialties:
  • Gravitation, Cosmology and Astroparticle Physics
  • High-Energy Physics - Theory
Approach: Theoretical

Abstract

We investigate the asymptotic safety scenario for a scalar-gravity system. This system contains two avatars of the dynamical Newton coupling, a gravitational self-coupling and a scalar-graviton coupling. We uncover an effective universality for the dynamical Newton coupling on the quantum level: its momentum-dependent avatars are in remarkable quantitative agreement in the scaling regime of the UV fixed point. For the background Newton coupling, this effective universality is not present, but qualitative agreement remains.

Ontology / Topics

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Quantum gravity Ultraviolet (UV) fixed points

Published as SciPost Phys. 5, 031 (2018)



List of changes

- extended motivation in the introduction
- added paragraph about STIs below equation (5)
- included Litim-type regulator and York-decomposition in App. A
- references updated
- other minor changes


Reports on this Submission

Anonymous Report 1 on 2018-8-2 (Invited Report)

Report

The authors have responded to
my critique. They have improved their rationale, and acknowledged the
limitations of the paper but pointed out the difficulties in doing better.
It is already clear that the paper reports on a substantive amount of
work. I think the paper
should be published.

  • validity: -
  • significance: -
  • originality: -
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