PIRSA:21060129

Video URL

https://pirsa.org/21060129

Quantum gravity Vs unimodular quantum gravity

Pereira, A. (2021). Quantum gravity Vs unimodular quantum gravity. Perimeter Institute for Theoretical Physics. https://pirsa.org/21060129

Pereira, Antonio. Quantum gravity Vs unimodular quantum gravity. Perimeter Institute for Theoretical Physics, Jun. 17, 2021, https://pirsa.org/21060129 

          @misc{ scivideos_PIRSA:21060129,
            doi = {10.48660/21060129},
            url = {https://pirsa.org/21060129},
            author = {Pereira, Antonio},
            keywords = {Quantum Gravity},
            language = {en},
            title = {Quantum gravity Vs unimodular quantum gravity},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2021},
            month = {jun},
            note = {PIRSA:21060129 see, \url{https://scivideos.org/index.php/pirsa/21060129}}
          }

Antonio Pereira Universidade Federal Fluminense

Talk numberPIRSA:21060129
DOI10.48660/21060129
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Strong gravity tests indicate that general relativity is a very accurate description of the classical dynamics of spacetime even at extreme regimes. Yet, the same dynamics can be described by "alternative" versions of general relativity such as unimodular gravity. In the quest for a quantum theory of the gravitational field, it is unclear if the quantization of such classically equivalent theories leads to the same physical predictions. In this talk, I will report on some recent results regarding this issue in the framework of continuum and perturbative quantum field theory. With a view towards ultraviolet completion, I will discuss some evidence for asymptotic safety in unimodular quantum gravity. Moreover, I will comment on the role of matter fields which couple very differently to gravity in those settings.