(Higher-spin) gravity as a quantum effect on quantum space-time

Harold Steinacker (U of Vienna)

Aug 25. 2021, 11:00 — 12:00

We discuss covariant quantum spaces as solutions of the IKKT or IIB matrix model with mass term. This leads to a ghost-free higher-spin gauge theory, which  contains all degrees of freedom for gravity. The gravitational sector can be understood in terms of an effective frame and an associated connection. The resulting covariant equations of motion of the classical model are discussed, which can be interpreted as pre-gravity, having 2 derivatives less than the Einstein-Hilbert action. The latter is recovered upon including the 1-loop effective action. This provides a new formulation of gravity which is intrinsically quantum.

Further Information
ESI Boltzmann Lecture Hall
Associated Event:
Geometry for Higher Spin Gravity: Conformal Structures, PDEs, and Q-manifolds (Thematic Programme)
Xavier Bekaert (U of Tours)
Andreas Cap (U of Vienna)
Stefan Fredenhagen (U of Vienna)
Maxim Grigoriev (U of Mons)
Alexei Kotov (U Hradec Králové)