Bound state solutions of the Klein Gordon equation with energy-dependent potentials

Abstract

In this manuscript, we investigate the exact bound state solution of the Klein Gordon equation with an energy-dependent Coulomb-like potential energy in the presence of position-energy dependent mass. First, we examine the case where the mixed vector and scalar potential energy possess equal magnitude and equal sign. Then, we extend the investigation with the cases where the mixed potential energies have equal magnitude and opposite sign. Furthermore, we study pure scalar and pure vector cases. In each case, we derive an analytic expression of the energy spectrum by employing the asymptotic iteration method. We obtain a non-trivial relation between the tuning parameters which lead the examined problem to a constant mass one. Finally, we employ the Secant method to calculate the energy spectra. We use the calculated spectra and show that the unnormalized wave functions satisfy the boundary conditions. We conclude the manuscript with a comparison of the calculated energy spectra versus tuning parameters.