Complete solution to Gaussian tensor model and its integrable properties

TL;DR

This paper explores the integrability and superintegrability of Gaussian tensor models, introducing new partition functions and analyzing their properties, advancing understanding of non-Abelian integrability in tensor models.

Contribution

It provides a complete solution to the Gaussian tensor model and investigates its integrable properties, including new partition functions and their $W$-representations.

Findings

Explicit expression of Gaussian correlators via Clebsh-Gordan coefficients

Introduction of associated partition functions with $W$-representations

Discussion on the potential for improved integrability properties

Abstract

Similarly to the complex matrix model, the rainbow tensor models are superintegrable in the sense that arbitrary Gaussian correlators are explicitly expressed through the Clebsh-Gordan coefficients. We introduce associated (Ooguri-Vafa type) partition functions and describe their $W$-representations. We also discuss their integrability properties, which can be further improved by better adjusting the way the partition function is defined. This is a new avatar of the old unresolved problem with non-Abelian integrability concerning a clever choice of the partition function. This is a part of the long-standing problem to define a non-Abelian lift of integrability from the fundamental to generic representation families of arbitrary Lie algebras.