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hep-th2025
Algebras, Entanglement Islands, and Observers
Hao Geng, Yikun Jiang, Jiuci Xu
Some recent work has postulated the existence of an "observer" for a consistent definition of subregion algebras in gravitational universes. The subregion algebras consist of opera…
hep-th2025
It from ETH: Multi-interval Entanglement and Replica Wormholes from Large- BCFT Ensemble
Hao Geng, Ling-Yan Hung, Yikun Jiang
We provide a derivation of the Ryu-Takayanagi (RT) formula in 3D gravity for generic boundary subregion--including RT surface phase transitions--directly from the dual two-dimensio…
hep-th2025★ 5 cited
Ryu-Takayanagi Formula for Multi-Boundary Black Holes from 2D Large- CFT Ensemble
Ning Bao, Hao Geng, Yikun Jiang
We study a class of quantum states involving multiple entangled CFTs in AdS/CFT, associated with multi-boundary black hole geometries, and demonstrate that the Ryu-Takayana…