PIRSA:18100085 Scientific Series Quantum Fields and Strings

DOI10.48660/18100085

Series: Quantum Fields and Strings

Pasterski, S. (2018). Superrotations and Flat Space Holography. Perimeter Institute. https://pirsa.org/18100085

Pasterski, Sabrina. Superrotations and Flat Space Holography. Perimeter Institute, Oct. 30, 2018, https://pirsa.org/18100085 

@misc{ pirsa_PIRSA:18100085,
  doi = {10.48660/18100085},
  url = {https://pirsa.org/18100085},
  author = {Pasterski, Sabrina},
  keywords = {Quantum Fields and Strings},
  language = {en},
  title = {Superrotations and Flat Space Holography},
  publisher = {Perimeter Institute},
  year = {2018},
  month = {oct},
  note = {PIRSA:18100085 see, \url{https://pirsa.org}}
}

Abstract

We consider implications of superrotations as an asymptotic symmetry of asymptotically flat spacetimes.  Beginning with a review of the rich structure of interconnections between soft theorems, asymptotic symmetries, and                 memory effects, we describe the superrotation iteration.  The subleading soft graviton theorem can be cast as a Ward identity for this asymptotic symmetry in 4D, and also as one for the stress tensor of a putative CFT2.  We detail the change of scattering basis motivated by this asymptotic symmetry and discuss recent progress.

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