Superintegrability of the monomial Uglov matrix model

TL;DR

This paper introduces a new basis of symmetric functions, Uglov polynomials, for $eta$-deformed monomial matrix models, revealing superintegrability through deformed measures and root of unity limits.

Contribution

It identifies Uglov polynomials as the appropriate basis for superintegrability in $eta$-deformed non-Gaussian matrix models, extending the understanding of symmetry and measure deformation.

Findings

Uglov polynomials serve as the superintegrability basis.

Deformed integration measure relates to the Uglov limit at roots of unity.

Root of unity limit is crucial for the superintegrability structure.

Abstract

In this paper we propose a resolution to the problem of $\beta$-deforming the non-Gaussian monomial matrix models. The naive guess of substituting Schur polynomials with Jack polynomials does not work in that case, therefore, we are forced to look for another basis for superintegrability. We find that the relevant symmetric functions are given by Uglov polynomials, and that the integration measure should also be deformed. The measure appears to be related to the Uglov limit as well, when the quantum parameters $(q,t)$ go to a root of unity. The degree of the root must be equal to the degree of the potential. One cannot derive these results directly, for example, by studying Virasoro constraints. Instead, we use the recently developed techniques of $W$-operators to arrive at the root of unity limit. From the perspective of matrix models this new example demonstrates that even with a rather nontrivial integration measure one can find a superintegrability basis by studying the hidden symmetry of the moduli space of deformations.