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 $\mathrm{SL}(2,\mathbb R)$ spin chains.
Keywords:
spin chains, separation of variables, Gustafson's integrals.
This work was supported by the Russian Science Foundation project No 19-11-00131 and by the
DFG grants MO 1801/4-1, KN 365/13-1 (A.M.). The work of K.K.K. is supported by CNRS.
Received:March 8, 2021; in final form June 14, 2021; Published online June 25, 2021
Citation:
Sergey É. Derkachov, Karol K. Kozlowski, Alexander N. Manashov, “Completeness of SoV Representation for $\mathrm{SL}(2,\mathbb R)$ Spin Chains”, SIGMA, 17 (2021), 063, 26 pp.