2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/210263The Dirac equation is solved using three-dimensional Finite Difference-Time Domain (FDTD) method. $Zitterbewegung$ and the dynamics of a well-localized electron are used as examples of FDTD application to the case of free electrons.9 pages, 6 figuresComputational PhysicsQuantum Physicstext