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arXiv · 2605.15776

Exact Bulk-Boundary Pairs in AdS/CFT

Xin Jiang·Peng Wang·Haitang Yang
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Abstract

We show that for a CFT$_D$ on a flat open solid torus, the two point function in the Weyl frame is exactly paired with a finite geodesic lying entirely in the AdS$_{D+1}$ bulk interior. This relation is exact and requires neither large $N$, strong coupling, nor heavy operators. The exactness is that of conformal kinematics; no semiclassical bulk dynamics is assumed. The standard boundary-anchored relation is a singular limit of the exact pair. For the free scalar, a mode expansion along $S^1$ generates an infinite tower of effective masses on $H_{D-1}$, whose intricate propagators resum exactly to the same simple higher-dimensional geodesic expression. Together with another exact pair between disjoint entanglement entropy and entanglement wedge cross-section found on the same open solid torus, this result points toward a broader exact-pair program in AdS/CFT.

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Xin Jiang, Peng Wang, Haitang Yang. 2026-05-20. Exact Bulk-Boundary Pairs in AdS/CFT. https://arxiv.org/abs/2605.15776

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