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Journal Article
Notes on flat-space limit of AdS/CFT
2021
Overview
A
bstract
Different frameworks exist to describe the flat-space limit of AdS/CFT, include momentum space, Mellin space, coordinate space, and partial-wave expansion. We explain the origin of momentum space as the smearing kernel in Poincare AdS, while the origin of latter three is the smearing kernel in global AdS. In Mellin space, we find a Mellin formula that unifies massless and massive flat-space limit, which can be transformed to coordinate space and partial-wave expansion. Furthermore, we also manage to transform momentum space to smearing kernel in global AdS, connecting all existed frameworks. Finally, we go beyond scalar and verify that
VV
O
maps to photon-photon-massive amplitudes.
Publisher
Springer Berlin Heidelberg,Springer Nature B.V,SpringerOpen
Subject
