2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/17929Using a semi-analytic model based on the Thomas-Fermi approximation, we investigate the relevance of the quadrupole deformation of a trapped Bose-Einstein condensate for the nucleation of quantized vortices. For sufficiently high angular velocities $Ω$ of the trap, the tendency of the system to exhibit spontaneous deformation is shown to lower the barrier which inhibits the nucleation of vortices at smaller $Ω$. The corresponding value of the critical angular velocity $Ω_c$ is calculated as a function of the deformation of the trap and of the chemical potential. The theoretical predictions for $Ω_c$ refer to the case of a sudden switch-on of the deformed rotating trap and they are compared with recent experimental data.12 pages, 4 postscript figuresCondensed Mattertext