Superintegrability of Kontsevich matrix model

Abstract

Many eigenvalue matrix models possess a peculiar basis of observables which have explicitly calculable averages. This explicit calculability is a stronger feature than ordinary integrability, just like the cases of quadratic and Coulomb potentials are distinguished among other central potentials, and we call it superintegrability. Aa a peculiarity of matrix models, the relevant basis is formed by the Schur polynomials (characters) and their generalizations, and superintegrability looks like a property $<character>\sim character$. This is already known to happen in the most important cases of Hermitian, unitary, and complex matrix models. Here we add two more examples of principal importance, where the model depends on external fields: a special version of the complex model and the cubic Kontsevich model. In the former case, straightforward is a generalization to the complex tensor model. In the latter case, the relevant characters are the celebrated $Q$ Schur functions appearing in the description of spin Hurwitz numbers and other related contexts.

13 pages

References in corpus (7)

• Generation of Matrix Models by W-operators
• On KP-integrable Hurwitz functions
• On the complete perturbative solution of one-matrix models
• Correlators in tensor models from character calculus
• Gauge Invariants, Correlators and Holography in Bosonic and Fermionic Tensor Models
• Complete solution to Gaussian tensor model and its integrable properties
• Matrix integral expansion of colored Jones polynomials for figure-eight knot