The Hartle-Hawking Wavefunction and de Sitter Black Holes - Gustavo Joaquin Turiaci
Автор: Institute for Advanced Study
Загружено: 2025-12-04
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Workshop on Quantum Aspects of Black Holes and Spacetime
Topic: The Hartle-Hawking Wavefunction and de Sitter Black Holes
Speaker: Gustavo Joaquin Turiaci
Affiliation: University of Washington
Date: December 4, 2025
Wolfensohn Hall
The Schwarzschild-de Sitter solution can be used to compute the Hartle-Hawking wavefunction of the universe on a spatial circle times a sphere. Its norm can be evaluated in the semiclassical limit and compared to the on-shell action of the Euclidean Nariai geometry. I will describe new results clarifying the role that quantum corrections to the wavefunction play in this derivation. Next, I will present a calculation of the phase of the path integral on Nariai to test whether, at the quantum level, it can be interpreted as a norm. In the process, I will derive a simple formula for the phase of the path integral on any solution of pure gravity. Finally, I will describe ongoing work based on an alternative interpretation of the Nariai geometry as computing the nucleation rate of black holes in de Sitter.
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