Year: 2011
Type: conference-paper
Abstract: We review recent results on symmetries of asymptotically flat spacetimes at null infinity. In higher dimensions, the symmetry algebra realizes the Poincar´ e algebra. In three and four dimensions, besides the infinitesimal supertranslations that have been known since the sixties, the algebras are evenly balanced because there are also infinitesimal superrotations. We provide the classification of central extensions of bms3 and bms4. Applications and consequences as well as directions for future work are briefly indicated.
DOI: 10.22323/1.127.0010
Authors: Glenn Barnich, Cédric Troessaert
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2964078318