Asymptotic safety in an interacting system of gravity and scalar matter

P. Donà, A. Eichhorn, P. Labus, R. Percacci

Publikation: Bidrag til tidsskriftTidsskriftartikelForskningpeer review

Abstrakt

Asymptotic safety is an attractive scenario for the dynamics of quantum spacetime. Here, we work from a phenomenologically motivated point of view and emphasize that a viable dynamics for quantum gravity in our Universe must account for the existence of matter. In particular, we explore the scale dependence of a scalar matter-gravity vertex, and investigate whether an interacting fixed point exists for the so-defined Newton coupling. We find a viable fixed point in the pure-gravity system, disregarding scalar quantum fluctuations. We explore its extensions to the case with dynamical scalars, and find indications of asymptotic safety in the matter-gravity system. We moreover examine the anomalous dimensions for different components of the metric fluctuations, and find significant differences between the transverse traceless and scalar component.

OriginalsprogEngelsk
Artikelnummer044049
TidsskriftPhysical Review D
Vol/bind93
Udgave nummer4
ISSN2470-0010
DOI
StatusUdgivet - 2016
Udgivet eksterntJa

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