Symmetries of asymptotically flat 4 dimensional spacetimes at null infinity revisited
Sep, 2009
6 pages
Published in:
- Phys.Rev.Lett. 105 (2010) 111103
e-Print:
- 0909.2617 [gr-qc]
Report number:
- ULB-TH-09-24
View in:
Citations per year
Abstract: (arXiv)
It is argued that the symmetry algebra of asymptotically flat spacetimes at null infinity in 4 dimensions should be taken as the semi-direct sum of supertranslations with infinitesimal local conformal transformations and not, as usually done, with the Lorentz algebra. As a consequence, two dimensional conformal field theory techniques will play as fundamental a role in this context of direct physical interest as they do in three dimensional anti-de Sitter gravity.Note:
- 7 pages Latex file, references added, comments on Poincare algebra and angular momentum added
- 04.60.-m
- 04.20.Ha
- gravitation: anti-de Sitter
- field theory: conformal
- algebra: Lie
- dimension: 2
- dimension: 4
- dimension: 3
- vector: Killing
References(17)
Figures(0)