Video URL

https://pirsa.org/17060022

Gravity degrees of freedom on a null surface

Hopfmueller, F. (2017). Gravity degrees of freedom on a null surface. Perimeter Institute for Theoretical Physics. https://pirsa.org/17060022

Hopfmueller, Florian. Gravity degrees of freedom on a null surface. Perimeter Institute for Theoretical Physics, Jun. 01, 2017, https://pirsa.org/17060022 

          @misc{ scivideos_PIRSA:17060022,
            doi = {10.48660/17060022},
            url = {https://pirsa.org/17060022},
            author = {Hopfmueller, Florian},
            keywords = {Other Physics},
            language = {en},
            title = {Gravity degrees of freedom on a null surface},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2017},
            month = {jun},
            note = {PIRSA:17060022 see, \url{https://scivideos.org/index.php/pirsa/17060022}}
          }

Florian Hopfmueller Nord Quantique

DOI 10.48660/17060022
Source Repository PIRSA
Collection
Talk Type Conference
Subject

Abstract

A canonical analysis for general relativity is performed on a null surface without fixing the diffeomorphism gauge, and the canonical pairs of configuration and momentum variables are derived. Next to the well-known spin-2 pair, also spin-1 and spin-0 pairs are identified. The boundary action for a null boundary segment of spacetime is obtained, including terms on codimension two corners. FH, Laurent Freidel arXiv:1611.03096, Phys. Rev. D 95, 104006 (2017)