2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/128275Strong correlation effects on electron transport through a spinless quantum dot are considered. When two single-particle levels in the quantum dot are degenerate, a conserved pseudospin degree of freedom appears for general tunneling matrix elements between the quantum dot and leads. Local fluctuations of the pseudospin in the quantum dot give rise to a pair of asymmetric conductance peaks near the center of a Coulomb valley. An exact relation to the population switching is provided.Fig. 4 and some technical details removed. To appear in PRLMesoscale and Nanoscale PhysicsStrongly Correlated Electronstext