2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/91000It is shown on a simple classical model of a quantum particle at rest that information contained into the quantum state (quantum information) can be obtained by integrating the corresponding probability distribution on phase space, i.e. by reduction of the information contained into the classical state.Latex, 2 pages. Authors e-mail: b.nikolov/shu-bg.netQuantum Physicstext