2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/114745A generalized Friedel sum rule is derived for a quantum dot with internal orbital and spin degrees of freedom. The result is valid when all many-body correlations are taken into account and it links the phase shift of the scattered electron to the displacement of its SPECTRAL density into the dot.RevTeX 4.0, 5 pagesMesoscale and Nanoscale PhysicsStrongly Correlated Electronstext