2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/95946We develop a general approach to the nonequilibrium dynamics of quantum impurity systems for arbitrary coupling strength. The numerical renormalization group is used to generate a complete basis set necessary for the correct description of the time evolution. We benchmark our method with the exact analytical solution for the resonant-level model. As a first application, we investigate the equilibration of a quantum dot subject to a sudden change of the gate voltage and external magnetic field. Two distinct relaxation times are identified for the spin and charge dynamics.5 pages, 5 figuresStrongly Correlated ElectronsMesoscale and Nanoscale Physicstext