Matching four-point functions in higher spin AdS_3/CFT_2

Abstract

Working in the context of the proposed duality between 3D higher spin gravity and 2D W_N minimal model CFTs, we compute a class of four-point functions in the bulk and on the boundary, and demonstrate precise agreement between them. This is the first computation of a correlator in 3D higher spin gravity whose functional form is not fixed by conformal invariance. In the bulk we make use of elegant methods to solve the scalar field equation using only matrix manipulations, while on the CFT side we employ the Coulomb gas representation. Comparison is made in the semiclassical limit, in which the central charge is taken to infinity at fixed N. Along the way, we establish the rules for computing correlation functions of multi-trace operators in higher spin gravity. The method involves solving the scalar master field equation in a general representation of the bulk gauge algebra. Although most of our work is carried out for the bulk theory based on sl(N) x sl(N), we also discuss how our methods can be adapted to the hs[λ] x hs[λ] theory, which is relevant in the 't Hooft limit.

41 pages

References in corpus (7)

• Holography from Conformal Field Theory
• Asymptotic symmetries of three-dimensional gravity coupled to higher-spin fields
• Nonlinear W(infinity) Algebra as Asymptotic Symmetry of Three-Dimensional Higher Spin Anti-de Sitter Gravity
• Symmetries of Holographic Minimal Models
• Correlation functions in conformal Toda field theory I
• A semi-local holographic minimal model
• Field Theory of Primaries in W_N Minimal Models

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