2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/208283In this paper we review some of our recent results on the problem of a qubit coupled to a quantum two-level system. We consider both the decoherence dynamics and the qubit's response to an oscillating external field.Short review of recent workSuperconductivityDecoherence and Rabi oscillations in a qubit coupled to a quantum two-level systemtext