Holograms In Our World
Raphael Bousso, Geoff Penington

TL;DR
This paper generalizes the concept of entanglement wedges from AdS/CFT to arbitrary spacetimes, defining max- and min-entanglement wedges that capture information flow and entropy properties in quantum gravity.
Contribution
It introduces a new framework for entanglement wedges in general spacetimes, extending holographic ideas beyond AdS/CFT and analyzing their information-theoretic properties.
Findings
Max- and min-entanglement wedges can differ at the classical level.
Information flow is governed by the areas of homology surfaces.
Entanglement wedges obey strong subadditivity and no-cloning principles.
Abstract
In AdS/CFT, the entanglement wedge EW is the portion of the bulk geometry that can be reconstructed from a boundary region ; in other words, EW is the hologram of . We extend this notion to arbitrary spacetimes. Given any gravitating region , we define a max- and a min-entanglement wedge, and , such that . Unlike their analogues in AdS/CFT, these two spacetime regions can differ already at the classical level, when the generalized entropy is approximated by the area. All information outside in can flow inwards towards , through quantum channels whose capacity is controlled by the areas of intermediate homology surfaces. In contrast, all information outside can flow outwards. The generalized entropies of appropriate entanglement wedges obey…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsCosmology and Gravitation Theories · Black Holes and Theoretical Physics · Advanced Mathematical Theories and Applications
