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- W3100802507 abstract "The formulation of an exact functional renormalization group equation for Quantum Einstein Gravity necessitates that the underlying effective average action depends on two metrics, a dynamical metric giving the vacuum expectation value of the quantum field, and a background metric supplying the coarse graining scale. The central requirement of background independence is met by leaving the background metric completely arbitrary. This bimetric structure entails that the effective average action may contain three classes of interactions: those built from the dynamical metric only, terms which are purely background, and those involving a mixture of both metrics. This work initiates the first study of the full-fledged gravitational RG flow, which explicitly accounts for this bimetric structure, by considering an ansatz for the effective average action which includes all three classes of interactions. It is shown that the non-trivial gravitational RG fixed point central to the Asymptotic Safety program persists upon disentangling the dynamical and background terms. Moreover, upon including the mixed terms, a second non-trivial fixed point emerges, which may control the theory's IR behavior." @default.
- W3100802507 created "2020-11-23" @default.
- W3100802507 creator A5006785370 @default.
- W3100802507 creator A5045017963 @default.
- W3100802507 creator A5063904538 @default.
- W3100802507 date "2011-02-01" @default.
- W3100802507 modified "2023-09-30" @default.
- W3100802507 title "Bimetric renormalization group flows in quantum Einstein gravity" @default.
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- W3100802507 doi "https://doi.org/10.1016/j.aop.2010.11.006" @default.
- W3100802507 hasPublicationYear "2011" @default.
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