Abstract

We explore asymptotic safety of gravity-matter systems, discovering indications for a near-perturbative nature of these systems in the ultraviolet. Our results are based on the dynamical emergence of effective universality at the asymptotically safe fixed point. Our findings support the conjecture that an asymptotically safe completion of the Standard Model with gravity could be realized in a near-perturbative setting.

Highlights

  • How nonperturbative is quantum gravity? What appears to be a technical question at the first glance, could be critical for the conceptual understanding of quantum spacetime

  • The nature of quantum gravity in the very early universe, its impact on matter, and the prospects of potential observational tests depend on the extent to which quantum spacetime is nonperturbative

  • Further evidence is required to back our discovery of potential nearperturbativity of asymptotically safe gravity

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Summary

Introduction

How nonperturbative is quantum gravity? What appears to be a technical question at the first glance, could be critical for the conceptual understanding of quantum spacetime. Our results are based on the dynamical emergence of effective universality at the asymptotically safe fixed point. It is a key result of this work that the β-functions of the different avatars of the Newton coupling agree semi-quantitatively in the asymptotically safe UV regime in gravity-matter systems.

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Conclusion
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