3 papers
gr-qc2025
Origin of the quantum group symmetry in 3d quantum gravity
Maïté Dupuis, Laurent Freidel, Florian Girelli +2
It is well-known that quantum groups are relevant to describe the quantum regime of 3d gravity. They encode a deformation of the gauge symmetries parametrized by the value of the c…
hep-th2024
Quantum Null Geometry and Gravity
Luca Ciambelli, Laurent Freidel, Robert G. Leigh
In this work, we demonstrate that quantizing gravity on a null hypersurface leads to the emergence of a CFT associated with each null ray. This result stems from the ultralocal nat…
hep-th2024
On the Definition of the Spin Charge in Asymptotically-Flat Spacetimes
Laurent Freidel, Seyed Faroogh Moosavian, Daniele Pranzetti
We propose a solution to a classic problem in gravitational physics consisting of defining the spin associated with asymptotically-flat spacetimes. We advocate that the correct asy…