2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/212027The concept of stochastic resonance in nonlinear dynamics is applied to interpret the capacity of noisy quantum channels. The two-Pauli channel is used to illustrate the idea. The fidelity of the channel is also considered. Noise enhancement is found for the fidelity but not for the capacity.3 pages, 4 figures, RevTeXQuantum PhysicsChaotic DynamicsStatistical MechanicsExactly Solvable and Integrable Systemstext