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BMS Group at Spatial Infinity: the Hamiltonian (ADM) approach

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Troessaert,  Cédric
Quantum Gravity & Unified Theories, AEI-Golm, MPI for Gravitational Physics, Max Planck Society;

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1801.03718.pdf
(Preprint), 498KB

JHEP03(2018)147.pdf
(Publisher version), 379KB

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Citation

Henneaux, M., & Troessaert, C. (2018). BMS Group at Spatial Infinity: the Hamiltonian (ADM) approach. Journal of high energy physics: JHEP, 2018(03): 147. doi:10.1007/JHEP03(2018)147.


Cite as: https://hdl.handle.net/21.11116/0000-0000-3D11-9
Abstract
New boundary conditions for asymptotically flat spacetimes are given at spatial infinity. These boundary conditions are invariant under the BMS group, which acts non trivially. The boundary conditions fulfill all standard consistency requirements: (i) they make the symplectic form finite; (ii) they contain the Schwarzchild solution, the Kerr solution and their Poincar\'e transforms, (iii) they make the Hamiltonian generators of the asymptotic symmetries integrable and well-defined (finite). The boundary conditions differ from the ones given earlier in the literature in the choice of the parity conditions. It is this different choice of parity conditions that makes the action of the BMS group non trivial. Our approach is purely Hamiltonian and off-shell throughout.