CFT reconstruction of local bulk operators in half-Minkowski space

Abstract

We construct a holographic map that reconstructs massless fields (scalars, Maxwell field \& Fierz-Pauli field) in half-Minkowski spacetime in $d+1$ dimensions terms of smeared primary operators in a large $N$ factorizable CFT in ${\mathbb{R}}^{d-1,1}$ spacetime dimensions. This map is based on a Weyl (rescaling) transformation from the Poincaré wedge of AdS to the Minkowski half-space; and on the HKLL smearing function, which reconstructs local bulk operators in the Poincaré AdS in terms of smeared operators on the conformal boundary of the Poincaré wedge. The massless scalar field is reconstructed up to the level of two-point functions, while the Maxwell field and massless spin-2 fields are reconstructed at the level of the one-point function. We also discuss potential ways the map can be generalized to higher dimensions, and to the full Minkowski space.

arXiv commentUpdated bibliography, Updated discussion section, 20 pages, 2 figures

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