2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/129545The dissipative quantum system is studied using the Thirring model with a boundary mass. At the critical point where the Thirring coupling vanishes, the theory reduces to a free fermion theory with a boundary mass. We construct boundary states for the dissipative quantum systems in one dimension, which describes the system off the critical points as well as at the critical points.6 pagesHigh Energy Physics - TheoryMesoscale and Nanoscale PhysicsQuantum Physicstext