Classical central extension for asymptotic symmetries at null infinity in three spacetime dimensions
par Barnich, Glenn 
;Compère, Geoffrey
Référence Classical and Quantum Gravity, 24, 5, page (15-23)
Publication Publié, 2007-02-20
;Compère, Geoffrey Référence Classical and Quantum Gravity, 24, 5, page (15-23)
Publication Publié, 2007-02-20
Article révisé par les pairs
| Résumé : | 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. © 2007 IOP Publishing Ltd. |
