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arxiv: 1702.04439 · v3 · pith:4BRWYR47new · submitted 2017-02-15 · 🌀 gr-qc · hep-th

Black Hole Entropy from BMS Symmetry at the Horizon

classification 🌀 gr-qc hep-th
keywords blackholesymmetryentropyhorizonalgebraaugmentedcovariant
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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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