Null boundary phase space: slicings, news & memory
Null boundary phase space: slicings, news & memory
A bstract We construct the boundary phase space in D -dimensional Einstein gravity with a generic given co-dimension one null surface $$ \mathcal{N} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>N</mml:mi> </mml:math> as the boundary. The associated boundary symmetry algebra is a semi-direct sum of diffeomorphisms of $$ \mathcal{N} $$ <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML"> <mml:mi>N</mml:mi> </mml:math> …