Calculation of bound states and resonances in perturbed Coulomb models
arXiv:0711.3036 · doi:10.1016/j.physleta.2008.01.020
Abstract
We calculate accurate bound states and resonances of two interesting perturbed Coulomb models by means of the Riccati-Padé method. This approach is based on a rational approximation to a modified logarithmic derivative of the eigenfunction and produces sequences of roots of Hankel determinants that converge towards the eigenvalues of the equation.