2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/89578The reachable set for a finite dimensional quantum system is shown to be the orbit of the group corresponding to the internal and control Hamiltonians, even if this group is not compact.3 pages, contains a nominal improvement over an earlier result of the Author and collaborators, and also explains why the improvement is only nominalQuantum Physicstext