Null boundary phase space: slicings, news & memory

@article{Adami2021NullBP,
  title={Null boundary phase space: slicings, news \& memory},
  author={Hamed Adami and Daniel Grumiller and M. M. Sheikh-Jabbari and Vahid Taghiloo and Hossein Yavartanoo and C'eline Zwikel},
  journal={Journal of High Energy Physics},
  year={2021}
}
Abstract We construct the boundary phase space in D-dimensional Einstein gravity with a generic given co-dimension one null surface $$ \mathcal{N} $$ N as the boundary. The associated boundary symmetry algebra is a semi-direct sum of diffeomorphisms of $$ \mathcal{N} $$ N and Weyl rescalings. It is generated by D towers of surface charges that are generic functions over $$ \mathcal{N} $$ N . These surface charges can be rendered integrable for appropriate slicings of the phase space… 
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