A perturbative treatment for the exponential-cosine-screened Coulomb potential
arXiv:quant-ph/0509004
Abstract
An alternative approximation scheme has been used in solving the Schroedinger equation for the exponential-cosine-screened Coulomb potential. The bound state energies for various eigenstates and the corresponding wave functions are obtained analytically up to the second perturbation term.
18 pages