FAST TRACK COMMUNICATION: Classical central extension for asymptotic symmetries at null infinity in three spacetime dimensions

Details FAST TRACK COMMUNICATION: Classical central extension for asymptotic symmetries at null infinity in three spacetime dimensions FAST TRACK COMMUNICATION: Classical central extension for asymptotic symmetries at null infinity in three spacetime dimensions

Mar 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007cqgra..24...15b&link_type=abstract

Classical and Quantum Gravity, Volume 24, Issue 5, pp. F15-F23 (2007).

Physics

13

Scientific paper

The symmetry algebra of asymptotically flat spacetimes at null infinity in three dimensions is the semi-direct sum of the infinitesimal diffeomorphisms on the circle with an Abelian ideal of supertranslations. The associated charge algebra is shown to admit a non-trivial classical central extension of Virasoro type closely related to that of the anti-de Sitter case.

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