2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/18000The correlation energies for two interacting electrons in a parabolic quantum dot are studied via a pseudo-perturbation recipe. It is shown that the central spike term, ($m^2-1/4)/r^2$, plays a distinctive role in determining the spectral properties of the above problem. The study is carried out for a wide range of the Coulomb coupling strength $λ$ relative to the confinement.18 pages Latex file, i ps figure, submitted for publicationSoft Condensed Mattertext