Year: 2026
Type: article
Abstract: We propose that holography contains an exact kinematic sector distinct from holographic dynamics. The appropriate setting for this sector is a CFT on an open solid torus in the Weyl frame. The open solid torus introduces an intrinsic scale, and the Weyl frame makes this scale manifest as an extra bulk direction. The resulting bulk-boundary pairs are exact and finite: no cutoff, large- N limit, strong-coupling assumption, or heavy-operator approximation is required. The AdS geometry appearing in this sector should be understood as a kinematic geometry; only in special CFTs and appropriate limits is it promoted to a dynamical semiclassical gravitational bulk theory. The standard boundary-anchored dictionary entries are recovered as singular limits. As a demonstration, we show that Weyl-frame two-point functions provide a replica-free definition of entanglement entropy.
Source: Physics Letters B
Author: Haitang Yang
Institution: Sichuan University
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Award: G5827761176
OpenAlex ID: W7161963941