What is Holography in the Plane-Wave Limit of AdS/CFT Correspondence ?

TL;DR

This paper clarifies the holographic principle in the plane-wave limit of AdS/CFT, proposing a tunneling interpretation that connects bulk Euclidean S-matrix with boundary operator-product expansion.

Contribution

It introduces a tunneling-based interpretation of the holographic relation in the plane-wave limit, resolving existing confusions in the literature.

Findings

Bulk-boundary relation interpreted via tunneling picture

Connection established between Euclidean S-matrix and BMN operators

Clarification of holography in the plane-wave limit

Abstract

The issue of holographic principle in the PP-wave limit of the AdS/CFT correspondence is discussed, in the hope of clarifying some confusions in the literature. We show that, in the plane-wave limit, the relation between the partition function in the bulk and the gauge-invariant correlation functions on the boundary should be interpreted on the basis of a tunneling picture in the semi-classical approximation which is appropriate for the plane-wave limit. This leads to a natural relation between Euclidean S-matrix in the bulk and the short-distance operator-product expansion of the so-called BMN operators on the boundary.