Local renormalization group functions from quantum renormalization group and holographic bulk locality

TL;DR

This paper investigates the connection between quantum and holographic renormalization group functions, revealing cancellations necessary for bulk locality and computing previously unknown functions in strongly coupled $ ext{N}=4$ super Yang-Mills theory.

Contribution

It demonstrates the consistency between quantum and holographic RG, and computes new local RG functions at strong coupling in $ ext{N}=4$ SYM.

Findings

One-loop universal local RG functions satisfy cancellation conditions for bulk locality.

Computed new local RG functions, including the diffusive term in the gauge coupling beta function.

Confirmed the duality invariance of RG functions in the weakly and strongly coupled limits.

Abstract

The bulk locality in the constructive holographic renormalization group requires miraculous cancellations among various local renormalization group functions. The cancellation is not only from the properties of the spectrum but from more detailed aspects of operator product expansions in relation to conformal anomaly. It is remarkable that one-loop computation of the universal local renormalization group functions in the weakly coupled limit of the $\mathcal{N}=4$ super Yang-Mills theory fulfils the necessary condition for the cancellation in the strongly coupled limit in its $SL(2,\mathbf{Z})$ duality invariant form. From the consistency between the quantum renormalization group and the holographic renormalization group, we determine some unexplored local renormalization group functions (e.g. diffusive term in the beta function for the gauge coupling constant) in the strongly coupled limit of the planar $\mathcal{N}=4$ super Yang-Mills theory.