2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/155090We consider electron waveguides (quantum wires) in graphene created by suitable inhomogeneous magnetic fields. The properties of uni-directional snake states are discussed. For a certain magnetic field profile, two spatially separated counter-propagating snake states are formed, leading to conductance quantization insensitive to backscattering by impurities or irregularities of the magnetic field.5 pages, 4 figures, final version accepted as Rapid Comm. in PRBMesoscale and Nanoscale Physicstext