Using Wheeler-DeWitt wave functionals, the paper argues that Minkowski-to-de Sitter nucleation has a nonzero relative probability in the zero-mass Schwarzschild limit and that dS-to-dS rates match Coleman-De Luccia and Brown-Teitelboim.
Black Hole Entropy in General Relativity
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abstract
The Bekenstein-Hawking formula relates the black hole entropy and horizon area. Semiclassical entropy computations have relied on an action principle that fixes a gauge dependent and classically unobservable boundary three-geometry and renders elusive a precise physical notion of both energy and entropy in de Sitter backgrounds. Instead, we impose gauge invariant boundary conditions and report the background independent action for black hole formation. Assuming standard arguments for the relation between the action and entropy, we reproduce the Bekenstein-Hawking formula and motivate a quantization of the phase-space volume. This background independent approach applies to spacetimes of arbitrary energy density and enables a radically conservative framework for semiclassical gravity.
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Quantum Transitions Between Minkowski and de Sitter Spacetimes
Using Wheeler-DeWitt wave functionals, the paper argues that Minkowski-to-de Sitter nucleation has a nonzero relative probability in the zero-mass Schwarzschild limit and that dS-to-dS rates match Coleman-De Luccia and Brown-Teitelboim.