Pawlowski, Jan M and Reichert, Manuel (2021) Quantum gravity: a fluctuating point of view. Frontiers in Physics, 8. a551848 1-34. ISSN 2296-424X

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Abstract

In this contribution, we discuss the asymptotic safety scenario for quantum gravity with a functional renormalisation group approach that disentangles dynamical metric fluctuations from the background metric. We review the state of the art in pure gravity and general gravity-matter systems. This includes the discussion of results on the existence and properties of the asymptotically safe ultraviolet fixed point, full ultraviolet-infrared trajectories with classical gravity in the infrared, and the curvature dependence of couplings also in gravity-matter systems. The results in gravity-matter systems concern the ultraviolet stability of the fixed point and the dominance of gravity fluctuations in minimally coupled gravity-matter systems. Furthermore, we discuss important physics properties such as locality of the theory, diffeomorphism invariance, background independence, unitarity, and access to observables, as well as open challenges.

Item Type:	Article
Schools and Departments:	School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups:	Theoretical Particle Physics Research Group
Depositing User:	Manuel Reichert
Date Deposited:	31 Aug 2021 14:23
Last Modified:	01 Sep 2021 11:30
URI:	http://sro.sussex.ac.uk/id/eprint/101367

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