Asymptotic safety in an interacting system of gravity and scalar matter

• Verfasst von: Donà, Pietro [VerfasserIn]
• Verfasst von: Eichhorn, Astrid [VerfasserIn]
• Titel: Asymptotic safety in an interacting system of gravity and scalar matter
• Verf.angabe: Pietro Donà, Astrid Eichhorn, Peter Labus, and Roberto Percacci
• Fussnoten: Gesehen am 11.01.2018
• Titel Quelle: Enthalten in: De.arxiv.org
• Jahr Quelle: 2016
• Band/Heft Quelle: (2016) Artikel-Nummer 1512.01589, 15 Seiten
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1567059112

Abstract

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.