2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/187196Quantum mechanics ordinarily describes particles as being pointlike, in the sense that the uncertainty $Δx$ can, in principle, be made arbitrarily small. It has been shown that suitable correction terms to the canonical commutation relations induce a finite lower bound to spatial localisation. Here, we perturbatively calculate the corrections to the energy levels of an in this sense nonpointlike particle in isotropic harmonic oscillators. Apart from a special case the degeneracy of the energy levels is removed.LaTeX, 9 pages, 1 figure included via epsf optionHigh Energy Physics - TheoryCondensed MatterNuclear Theorytext