PIRSA:18100058 Scientific Series Quantum Gravity

DOI10.48660/18100058

Series: Quantum Gravity

Hopfmueller, F. (2018). Null conservation laws for gravity. Perimeter Institute. https://pirsa.org/18100058

Hopfmueller, Florian. Null conservation laws for gravity. Perimeter Institute, Oct. 11, 2018, https://pirsa.org/18100058 

@misc{ pirsa_PIRSA:18100058,
  doi = {10.48660/18100058},
  url = {https://pirsa.org/18100058},
  author = {Hopfmueller, Florian},
  keywords = {Quantum Gravity},
  language = {en},
  title = {Null conservation laws for gravity},
  publisher = {Perimeter Institute},
  year = {2018},
  month = {oct},
  note = {PIRSA:18100058 see, \url{https://pirsa.org}}
}

Abstract

I discuss the canonical degrees of freedom of metric Einstein gravity on a null surface. The constraints are interpreted as conservation equations of a boundary current. Gravitational fluxes are identified, and the Hamiltonians of diffeomorphism symmetry are discussed. Special attention is given to the role of a modification of the phase space at the boundary of the null surface. Based on 1802.06135 with Laurent Freidel.

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