Hopf Ideals for General Relativity

David Prinz (HU Berlin)

Nov 08. 2021, 14:15 — 14:40

In this talk, I will present recent results on a possible renormalization of (effective) Quantum General Relativity in the Hopf algebra setup of Connes and Kreimer. It was shown by van Suijlekom (2007) that the quantum counterparts of gauge symmetries induce Hopf ideals in the respective renormalization Hopf algebra. In a recent article, I have generalized this correspondence to non-renormalizable theories with multiple coupling constants. This suggests, as I will explain in detail, a renormalization of (effective) Quantum General Relativity by properly incorporating the diffeomorphism invariance into the renormalization operation. Finally, I will close with an outline on the current state of this endeavor and comment on the related concepts of Feynman graph cohomology and the Corolla polynomial.

Further Information
ESI Boltzmann Lecture Hall
Associated Event:
Higher Structures Emerging from Renormalisation (Graduate School)
Pierre Clavier (U of Haut-Alsace)
Kurusch Ebrahimi-Fard (NTNU, Trondheim)
Peter K. Friz (TU Berlin)
Harald Grosse (U of Vienna)
Dominique Manchon (U Clerment Auvergne)
Sylvie Paycha (U of Potsdam)
Sylke Pfeiffer (U of Potsdam)