The phase diagram of quantum gravity from diffeomorphism-invariant RG-flows

2012/03/19 by Ivan Donkin, Jan M. Pawlowski, Donkin, Ivan +1 · 3 citations
Physics and Astronomy · #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Theory (hep-th) #gr-qc #hep-th

paper · pdf · doi:10.48550/arxiv.1203.4207

23 pages, 13 figures

arxiv created 2012/03/19 · arxiv updated 2012/03/20

Abstract

We evaluate the phase diagram of quantum gravity within a fully diffeomorphism-invariant renormalisation group approach. The construction is based on the geometrical or Vilkovisky-DeWitt effective action. We also resolve the difference between the fluctuation metric and the background metric. This allows for fully background-independent flows in gravity. The results provide further evidence for the ultraviolet fixed point scenario in quantum gravity with quantitative changes for the fixed point physics. We also find a stable infrared fixed point related to classical Einstein gravity. Implications and possible extensions are discussed.

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• Scaling solutions for gauge invariant flow equations in dilaton quantum gravity
• Ghosts that Connect
• Matter Spectral Functions from Quantum Gravity

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