PIRSA:21090001

q- deformed LQG with a cosmological constant

Pan, Q. (2021). q- deformed LQG with a cosmological constant. Perimeter Institute. https://pirsa.org/21090001

Pan, Qiaoyin. q- deformed LQG with a cosmological constant. Perimeter Institute, Sep. 02, 2021, https://pirsa.org/21090001 

          @misc{ pirsa_PIRSA:21090001,
            doi = {10.48660/21090001},
            url = {https://pirsa.org/21090001},
            author = {Pan, Qiaoyin},
            keywords = {Quantum Gravity},
            language = {en},
            title = {q- deformed LQG with a cosmological constant},
            publisher = {Perimeter Institute},
            year = {2021},
            month = {sep},
            note = {PIRSA:21090001 see, \url{https://pirsa.org}}
          }

Qiaoyin Pan Florida Atlantic University

DOI 10.48660/21090001
Collection
Talk Type Scientific Series
Subject

Abstract

The inclusion of the cosmological constant is one of the main questions faced by quantum gravity. In three dimensions, non-perturbative approaches to quantum gravity including loop quantum gravity (LQG),  combinatorial quantization and  spinfoam path integrals encode the cosmological constant as a deformation parameter in a quantum group structure. In this talk, I will focus on the LQG approach: I will explain the Poisson-Lie structure of the classical phase space and how its quantization naturally leads to the emergence of quantum groups. I will use the holonomy-flux algebra and its spinorial presentation introduced in the series of work by Bonzom, Dupuis, Girelli, Livine and myself. This allows to construct the Hamiltonian constraint, understand its matrix elements as Turaev-Viro amplitudes. This connects LQG to the other approaches in a unified mathematical setting.