2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/25507We investigate the decoherence effect of telegraph noise on a single qubit, usually provoked by bistable fluctuators. To diminish the dephasing and relaxation impact an effective refocusing scheme (so-called Bang-Bang pulses) is proposed. Detailed numerical as well as analytical random walk analysis allows in particular to evaluate the applicability of non-perfect Bang-Bang pulses.Mesoscale and Nanoscale PhysicsSuperconductivitytext