# Symmetries and charges of general relativity at null boundaries

@article{Chandrasekaran2018SymmetriesAC, title={Symmetries and charges of general relativity at null boundaries}, author={Venkatesa Chandrasekaran and Eanna E. Flanagan and K. Vignesh Prabhu}, journal={Journal of High Energy Physics}, year={2018}, volume={2018}, pages={1-68} }

A bstractWe study general relativity at a null boundary using the covariant phase space formalism. We define a covariant phase space and compute the algebra of symmetries at the null boundary by considering the boundary-preserving diffeomorphisms that preserve this phase space. This algebra is the semi-direct sum of diffeomorphisms on the two sphere and a nonabelian algebra of supertranslations that has some similarities to supertranslations at null infinity. By using the general prescription… CONTINUE READING

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