Journal
PHYSICAL REVIEW LETTERS
Volume 105, Issue 11, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.105.111103
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Funding
- Fund for Scientific Research-FNRS (Belgium)
- Belgian Federal Science Policy Office through the Interuniversity Attraction Pole [P6/11]
- IISN-Belgium
- Fondecyt [1085322]
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It is shown that the symmetry algebra of asymptotically flat spacetimes at null infinity in 4 dimensions should be taken as the semidirect 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.
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