2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/80031We investigate quantum integrals of motion in the sine-Gordon, Zhiber-Shabat and similar systems. When the coupling constants in these models take special values a new quantum symmetry appears. In those cases, correlation functions can be obtained, and they have a power law behavior.11 pagesExactly Solvable and Integrable Systemstext