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Extended Static Patch Holography (Global de Sitter Encoding)

Demonstrate that global de Sitter spacetime is fully encoded by two holographic screens associated with antipodal observers by proving that the interior regions are directly encoded on the screens and that the exterior region emerges from entanglement between the two screens.

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Background

This conjecture extends static patch holography to global de Sitter: two screens, one per antipodal observer, together encode the entire spacetime. The thesis argues that the exterior region appears as an emergent ‘bridge’ from the entanglement between the two screen theories, paralleling ER=EPR phenomena.

References

Conjecture [Extended static patch holography] Global de Sitter spacetime can be encoded holographically in terms of a quantum theory defined on the two cosmological horizons. The states of the interior regions $D_{\rm L}$ and $D_{\rm R}$ are encoded on $\Sigma\vert_{\mathcal{S}$. The exterior region $D_{\rm E}$ emerges from the entanglement between $\Sigma\vert_{\mathcal{S}{\rm L}$ and $\Sigma\vert{\mathcal{S}_{\rm R}$.

— Information-theoretic constraints in quantum gravity and cosmology (2510.15787 - Franken, 17 Oct 2025) in Chapter: Bridging the static patches: Connectivity of de Sitter space, Section: The Pair of Holographic Screens is Pure and Encodes Everything