5 citations · 6 across the 4 of their papers we have counts for
6 papers
Closed Universe, Quantum Entanglement and Observers
Hao Geng
It has been argued that in quantum gravity the Hilbert space associated with any closed universe is trivially one-dimensional. To reconcile this argument with the richness of our o…
Covariant Locally Localized Gravity and vDVZ Continuity
Hao Geng, Moritz Merz, Lisa Randall
The Karch-Randall braneworld concerns the physics of an AdS brane embedded in an ambient gravitational AdS spacetime. The gravitational theory induced on the AdS$_{d}…
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…
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…
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…
Microscopic Origin of the Entropy of Single-sided Black Holes
Hao Geng, Yikun Jiang
In this paper, we provide a state-counting derivation of the Bekenstein-Hawking entropy formula for single-sided black holes. We firstly articulate the concept of the black hole mi…