Completeness of SoV Representation for Spin Chains
arXiv:2102.13570 · doi:10.3842/SIGMA.2021.063
Abstract
This work develops a new method, based on the use of Gustafson's integrals and on the evaluation of singular integrals, allowing one to establish the unitarity of the separation of variables transform for infinite-dimensional representations of rank one quantum integrable models. We examine in detail the case of the spin chains.