Improved susy inspired variational method to obtain bound state energies of the screened Coulomb potential

We improve a result obtained in Ref. 2: In the context of supersymmetric quantum mechanics we present a certain superpotential that yields a trial function we use for the calculation of variational quantum bound state energies of the screened Coulomb potential. We show that for small screening parameters our trial function yields better approximations for the energies than the trial function used in Ref. 2.