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Black Hole Entropy from BMS Symmetry at the Horizon
Published 15 Feb 2017 in gr-qc and hep-th | (1702.04439v3)
Abstract: Near the horizon, the obvious symmetries of a black hole spacetime---the horizon-preserving diffeomorphisms---are enhanced to a larger symmetry group with a BMS${}_3$ algebra. Using dimensional reduction and covariant phase space techniques, I investigate this augmented symmetry, and show that it is strong enough to determine the black hole entropy.
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