Non-Perturbative Propagators in Quantum Gravity
Benjamin Knorr
Abstract
We employ non-perturbative renormalisation group methods to compute the full momentum dependence of propagators in quantum gravity in general dimensions. We disentangle all different graviton and Faddeev–Popov ghost modes and find qualitative differences in the momentum dependence of their propagators. This allows us to reconstruct the form factors that are quadratic in curvature from first principles, which enter physical observables like scattering cross sections. The results are qualitatively stable under variations of the gauge fixing choice.
Topics & Concepts
PhysicsPropagatorGravitonQuantum gravityObservableMomentum (technical analysis)Mathematical physicsNon-perturbativeTheoretical physicsCurvatureQuantumQuantum electrodynamicsClassical mechanicsQuantum mechanicsGravitationFinanceGeometryEconomicsMathematicsBlack Holes and Theoretical PhysicsParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle Interactions