US Patent 9040959 Multi-band topological nanowires

A topological qubit wire hosts Majorana zero-energy modes and includes a superconductor, which may be an s-wave superconductor, and a quasi-1D nanowire, which may be a semi-conductor. The Majorana zero-energy modes are localized at ends of the quasi-1D nanowire, which may be sized and shaped to provide occupancy of a few transverse modes in a first direction and occupancy of a few transverse modes in a second direction. In some instances, the occupancy in the first direction may be greater than or equal to 3, and the occupancy in the second direction may be 1.