2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/202953When a confined system interacts with its walls (treated quantum mechanically), there is an intertwining of degrees of freedom. We show that this need not lead to entanglement, hence decoherence. It will generally lead to error. The wave function optimization required to avoid decoherence is also examined.10 pages, plain TeX, no figuresQuantum Physicstext