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hep-th2023
A non-perturbative second law of black hole mechanics in effective field theory
Iain Davies, Harvey S. Reall
We describe a method for defining dynamical black hole entropy in gravitational effective field theories (EFTs). The entropy is constructed order by order in derivatives. For any f…
gr-qc2023
Creases, corners and caustics: properties of non-smooth structures on black hole horizons
Maxime Gadioux, Harvey S. Reall
The event horizon of a dynamical black hole is generically a non-smooth hypersurface. We classify the types of non-smooth structure that can arise on a horizon that is smooth at la…