# 2-Groups in quantum gravity

### APA

Laudonio, M. (2021). 2-Groups in quantum gravity. Perimeter Institute. https://pirsa.org/21110027

### MLA

Laudonio, Matteo. 2-Groups in quantum gravity. Perimeter Institute, Nov. 18, 2021, https://pirsa.org/21110027

### BibTex

@misc{ pirsa_21110027, doi = {10.48660/21110027}, url = {https://pirsa.org/21110027}, author = {Laudonio, Matteo}, keywords = {Quantum Gravity}, language = {en}, title = {2-Groups in quantum gravity}, publisher = {Perimeter Institute}, year = {2021}, month = {nov}, note = {PIRSA:21110027 see, \url{https://pirsa.org}} }

## Abstract

Quantum groups are the proper tool to describe quantum gravity in three dimensions. Several arguments suggest that 2-groups should be used to formulate four dimensional quantum gravity. I will review these motivations and will discuss in particular how 2-groups can be used to extend the definition of a phase space associated to a triangulation or to modify the notion of group field theory to generate topological models. I will also highlight how the kappa Poincaré deformation arises in the 2-group context.