3 papers
hep-th2026
The pole truth: an analytical graviton propagator from Asymptotic Safety
Benjamin Knorr
We derive an analytical approximation for the graviton propagator from Asymptotic Safety. We find neither extra poles nor indications of unitarity or causality violations in the sp…
hep-th2023
Robustness of the derivative expansion in Asymptotic Safety
Alessio Baldazzi, Kevin Falls, Yannick Kluth +1
We analyse the renormalisation group flow of quantum gravity at sixth order in the derivative expansion within the background field approximation. Non-linear field redefinitions ar…
hep-th2023
Momentum-dependent field redefinitions in Asymptotic Safety
Benjamin Knorr
We discuss general momentum-dependent field redefinitions in the context of quantum-gravitational scattering amplitudes in general, and Asymptotic Safety in particular. Implementin…