2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/41713We solve the single particle Dirac bound state equation with a particular confining potential and comment its significance from the point of view of the quantum field theory. We show that the solutions describe a complex physical system made of a free particle and of an effective field representing the confining potential.6 pages, LateXHigh Energy Physics - Phenomenologytext