Global flows in quantum gravity
Nicolai Christiansen, Benjamin Knorr, Jan M. Pawlowski, Andreas Rodigast
Abstract
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Nicolai Christiansen, Benjamin Knorr, Jan M. Pawlowski, Andreas Rodigast
Abstract
Open-access reader
We study four-dimensional quantum gravity using nonperturbative renormalization group methods. We solve the corresponding equations for the fully momentum-dependent propagator, Newtons coupling and the cosmological constant. For the first time, we obtain a global phase diagram where the non-Gaussian ultraviolet fixed point of asymptotic safety is connected via smooth trajectories to a classical infrared fixed point. The theory is therefore ultraviolet complete and deforms smoothly into classical gravity as the infrared limit is approached.
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We study four-dimensional quantum gravity using nonperturbative renormalization group methods. We solve the corresponding equations for the fully momentum-dependent propagator, Newtons coupling and the cosmological constant. For the first time, we obtain a global phase diagram where the non-Gaussian ultraviolet fixed point of asymptotic safety is connected via smooth trajectories to a classical infrared fixed point. The theory is therefore ultraviolet complete and deforms smoothly into classical gravity as the infrared limit is approached.
Key concepts: Asymptotic safety in quantum gravity, Ultraviolet fixed point, Propagator, Infrared fixed point, Quantum gravity, Physics, Renormalization group, Fixed point