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hep-th2025
Gravitational Hilbert spaces: invariant and co-invariant states, inner products, gauge-fixing, and BRST
Jesse Held, Henry Maxfield
Hilbert spaces in theories of gravity are notoriously subtle due to the Hamiltonian constraints, particularly regarding the inner product. To demystify this subject, we review and…
hep-th2025
An apologia for islands
Stefano Antonini, Chang-Han Chen, Henry Maxfield +1
Entanglement islands have played a key role in the recent derivation of the Page curve and other progress on the black hole information problem. Arising from the inclusion of conne…