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Asymptotic Safety in Lorentzian quantum gravity (2310.20603v2)
Published 31 Oct 2023 in hep-th, gr-qc, math-ph, and math.MP
Abstract: We report on a recently introduced Functional Renormalization Group (RG) Equation, and we apply it to quantum gravity in Lorentzian spacetimes. While the RG flow is state-dependent, it is possible to evaluate state and background independent contributions to the flow. Taking into account only these universal terms, the RG flow exhibits a non-trivial fixed point in the Einstein-Hilbert truncation, providing a mechanism for Asymptotic Safety in Lorentzian quantum gravity.