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arxiv: 1601.05416 · v3 · submitted 2016-01-20 · ✦ hep-th · gr-qc· quant-ph

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Reconstruction of Bulk Operators within the Entanglement Wedge in Gauge-Gravity Duality

Xi Dong , Daniel Harlow , Aron C. Wall

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classification ✦ hep-th gr-qcquant-ph
keywords operatorsquantumwedgebulkcorrespondenceentanglementreconstructionsubregion
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In this Letter we prove a simple theorem in quantum information theory, which implies that bulk operators in the Anti-de Sitter / Conformal Field Theory (AdS/CFT) correspondence can be reconstructed as CFT operators in a spatial subregion $A$, provided that they lie in its entanglement wedge. This is an improvement on existing reconstruction methods, which have at most succeeded in the smaller causal wedge. The proof is a combination of the recent work of Jafferis, Lewkowycz, Maldacena, and Suh on the quantum relative entropy of a CFT subregion with earlier ideas interpreting the correspondence as a quantum error correcting code.

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