  We propose and analyze theoretically a one-dimensional solid-state electronic
setup that operates as a topological charge pump in the complete absence of
superimposed oscillating local voltages. The system consists of a
semiconducting narrow channel with strong Rashba spin-orbit interaction
patterned in a mesoscale serpentine shape. A rotating planar magnetic field
serves as the external ac perturbation, and cooperates with the Rashba
spin-orbit interaction, which is modulated by the geometric curvature of the
electronic channel to realize the topological pumping protocol originally
introduced by Thouless in an entirely novel fashion. We expect the precise
pumping of electric charges in our mesoscopic quantum device to be relevant for
quantum metrology purposes.
