Physical Predictions in Closed Quantum Gravity

arXiv:2602.13387 · hep-th, astro-ph.CO, gr-qc, hep-ph · Submitted 2026-02-13 · Read on arXiv

hep-th, astro-ph.CO, gr-qc, hep-ph

Submitted: 2026-02-13

Updated: 2026-09-24

Comments: 35 pages, 9 figures; v2: references added; v3: minor clarifications

License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/

Terminology

• Hilbert Space — 58× in this paper · explained in 2 episodes
• Quantization — 8× in this paper · explained in 12 episodes
• Entanglement — 6× in this paper · explained in 3 episodes
• Accuracy — 5× in this paper · explained in 1 episode
• Entanglement Entropy — 3× in this paper · explained in 2 episodes
• Trace — 2× in this paper · explained in 2 episodes
• Alignment — 1× in this paper · explained in 1 episode
• Consistency — 1× in this paper · explained in 3 episodes
• Generalization — 1× in this paper · explained in 13 episodes
• Phase Transitions — 1× in this paper · explained in 2 episodes
• Quantum Physics — 1× in this paper · explained in 10 episodes
• Redundancy — 1× in this paper · explained in 2 episodes
• Yukawa Institute for Theoretical Physics — 1× in this paper

Sources

• The Large N Limit of Superconformal Field Theories and Supergravity
• Holographic Derivation of Entanglement Entropy from AdS/CFT
• A Covariant Holographic Entanglement Entropy Proposal
• Quantum corrections to holographic entanglement entropy
• Quantum Extremal Surfaces: Holographic Entanglement Entropy beyond the Classical Regime
• Replica wormholes and the black hole interior
• Replica Wormholes and the Entropy of Hawking Radiation
• Entanglement Wedge Reconstruction and the Information Paradox
• The Page curve of Hawking radiation from semiclassical geometry
• Closed universes in two dimensional gravity
• Closed universes, factorization, and ensemble averaging
• Do holographic CFT states have unique semiclassical bulk duals?
• Quantum mechanics and observers for gravity in a closed universe
• The gravitational path integral from an observer's point of view
• On observers in holographic maps
• Observers seeing gravitational Hilbert spaces: abstract sources for an abstract path integral
• Observers and Timekeepers: From the Page-Wootters Mechanism to the Gravitational Path Integral
• The Baby Universe is Fine and the CFT Knows It: On Holography for Closed Universes
• Observers, $\alpha$-parameters, and the Hartle-Hawking state
• "It from Bit": The Hartle-Hawking state and quantum mechanics for de Sitter observers

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• Exact WKB analysis of inverted triple-well: resonance, PT-symmetry breaking, and resurgence
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• Combinatorial properties of holographic entropy inequalities
• The Magic Barrier: A Universal Feature of Quantum Thermalization
• S-duality, boundary states, and higher-form symmetries on ALE spaces