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arXiv · 1507.00354

Covariant Constraints on Hole-ography

Netta Engelhardt·Sebastian Fischetti
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Abstract

Hole-ography is a prescription relating the areas of surfaces in an AdS bulk to the differential entropy of a family of intervals in the dual CFT. In (2+1) bulk dimensions, or in higher dimensions when the bulk features a sufficient degree of symmetry, we prove that there are surfaces in the bulk that cannot be completely reconstructed using known hole-ographic approaches, even if extremal surfaces reach them. Such surfaces lie in easily identifiable regions: the interiors of holographic screens. These screens admit a holographic interpretation in terms of the Bousso bound. We speculate that this incompleteness of the reconstruction is a form of coarse-graining, with the missing information associated to the holographic screen. We comment on perturbative quantum extensions of our classical results.

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Netta Engelhardt, Sebastian Fischetti. 2015-07-01. Covariant Constraints on Hole-ography. https://doi.org/10.1088/0264-9381%2F32%2F19%2F195021

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