Bound states of the one-dimensional Dirac equation for scalar and vector double square-well potentials

Abstract We have analytically studied bound states of the one-dimensional Dirac equation for scalar and vector double square-well potentials (DSPs), by using the transfer-matrix method. Detailed numerical calculations of the eigenvalue, wave function and density probability have been performed for the three cases: (1) vector DSP only, (2) scalar DSP only, and (3) scalar and vector DSPs with equal magnitudes. We discuss the difference and similarity among results of the cases (1)–(3) in the Dirac equation and that in the Schrodinger equation. Motion of a wave packet is calculated for a study on quantum tunneling through the central barrier in the DSP.