PIRSA:17030057

Video URL

https://pirsa.org/17030057

Loop-Corrected Virasoro Symmetry of 4D Quantum Gravity

He, T. (2017). Loop-Corrected Virasoro Symmetry of 4D Quantum Gravity. Perimeter Institute for Theoretical Physics. https://pirsa.org/17030057

He, Temple. Loop-Corrected Virasoro Symmetry of 4D Quantum Gravity. Perimeter Institute for Theoretical Physics, Mar. 28, 2017, https://pirsa.org/17030057 

          @misc{ scivideos_PIRSA:17030057,
            doi = {10.48660/17030057},
            url = {https://pirsa.org/17030057},
            author = {He, Temple},
            keywords = {Quantum Fields and Strings},
            language = {en},
            title = {Loop-Corrected Virasoro Symmetry of 4D Quantum Gravity},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2017},
            month = {mar},
            note = {PIRSA:17030057 see, \url{https://scivideos.org/pirsa/17030057}}
          }

Temple He California Institute of Technology (Caltech)

Talk numberPIRSA:17030057
DOI10.48660/17030057
Source RepositoryPIRSA
Collection
Talk Type Scientific Series
Subject

Abstract

Recently a boundary energy-momentum tensor Tzz has been constructed from the soft graviton operator for any 4D quantum theory of gravity in asymptotically flat space. Up to an "anomaly" which is one-loop exact, Tzz generates a Virasoro action on the 2D celestial sphere at null infinity. Here we show by explicit construction that the effects of the IR divergent part of the anomaly can be eliminated by a one-loop renormalization that shifts Tzz.