Endstates in multichannel spinless p-wave superconducting wires
  Multimode spinless p-wave superconducting wires with a width W much smaller than the superconducting coherence length \xi are known to have multiple low-energy subgap states localized near the wire's ends. Here we compare the typical energies of such endstates for various terminations of the wire: A superconducting wire coupled to a normal-metal stub, a weakly disordered superconductor wire and a wire with smooth confinement. Depending on the termination, we find that the energies of the subgap states can be higher or lower than for the case of a rectangular wire with hard-wall boundaries. 
M.-T. Rieder, G. Kells, M. Duckheim, D. Meidan, P. W. Brouwer
cond-mat.mes-hall