Electrons in cylindrical quantum wires

The cylindrical quantum wires are analyzed in this paper. Translational symmetry holds along x-axis. The number of atoms in circular discs is several. For example, the Scot's model of /spl alpha/-helix contains three molecules in discs. The cylindrical quantum wires with three and four atoms are investigated. Energies of electrons as well as currents are found. It is interesting that in both cases electron energy spectrum is degenerated. In the case of four atoms all currents are equal, while in the case of three atoms the current of non-degenerated energy level is two times higher than others. Consequently, the wire with three atoms in discs works as modulator of electric impulses.