2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/151677The persistent current $I$ in integrable models of multichannel rings with both short- and long-ranged interactions is investigated. $I$ is found to oscillate in sign and increase in magnitude with increasing interaction strength due to interaction-induced correlations in the currents contributed by different channels. For sufficiently strong interactions, the contributions of all channels are found to add constructively, leading to a giant enhancement of $I$. Numerical results confirm that this parity-locking effect is robust with respect to subband mixing due to disorder.Latex, prerpint of Univ. Fribourg and Ecole Fed. Polytech, submitted to PRL for publicationMesoscale and Nanoscale Physicstext