Asymptotic safety in an interacting system of gravity and scalar matter
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 de...
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| Main Authors: | , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
16 February 2016
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| In: |
Physical review
Year: 2016, Volume: 93, Issue: 4, Pages: 044049 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.93.044049 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1103/PhysRevD.93.044049 Verlag, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.93.044049 
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| Author Notes: | Pietro Donà, Astrid Eichhorn, Peter Labus, and Roberto Percacci |
| Summary: | 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. |
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| Item Description: | Phys. Rev. D 93, 044049 – Published 16 February 2016; Erratum Phys. Rev. D 93, 129904 (2016) Gesehen am 21.11.2017 |
| Physical Description: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.93.044049 |