Perturbative lessons for nonperturbative quantum gravity


Zanusso, O. (2021). Perturbative lessons for nonperturbative quantum gravity. Perimeter Institute. https://pirsa.org/21100013


Zanusso, Omar. Perturbative lessons for nonperturbative quantum gravity. Perimeter Institute, Oct. 07, 2021, https://pirsa.org/21100013


          @misc{ pirsa_21100013,
            doi = {10.48660/21100013},
            url = {https://pirsa.org/21100013},
            author = {Zanusso, Omar},
            keywords = {Quantum Gravity},
            language = {en},
            title = {Perturbative lessons for nonperturbative quantum gravity},
            publisher = {Perimeter Institute},
            year = {2021},
            month = {oct},
            note = {PIRSA:21100013 see, \url{https://pirsa.org}}

Omar Zanusso SISSA Scuola Internazionale Superiore di Studi Avanzati

Talk Type Scientific Series


In the asymptotic safety approach to quantum gravity it is conjectured that a nonperturbative ultraviolet completion exists for Einstein's metric gravity and its perturbative effective description in four dimensions. Such completion would circumvent the notorious problems of renormalizability and predictivity at high energies of the quantum theory. I want do discuss the conjecture armed with pragmatism and avoiding preconceived ideologies. I also want to present some perturbative results in two dimensions, that can be used to argue the validity of the conjecture above two dimensions, and to discuss the implications for the current status of the approach.