Special polynomials related to the supersymmetric eight-vertex model. II. Schrödinger equation

Preprint, 2013

We show that symmetric polynomials previously introduced by the author satisfy a certain differential equation. After a change of variables, it can be written as a non-stationary Schrödinger equation with elliptic potential, which is closely related to the Knizhnik-Zamolodchikov-Bernard equation and to the canonical quantization of the Painlevé VI equation. In a subsequent paper, this will be used to construct a four-dimensional lattice of tau functions for Painlevé VI.