Even–odd parity effects in Majorana junctions

We study a general Majorana junction, where N helical nanowires are connected to a common s-wave superconductor proximity-inducing Majorana bound states in the wires. The normal part of each wire (j = 1,…,N) acts as connected lead, where electrons can tunnel into the respective Majorana state γA,j. The Majorana states at the other end, γB,j, are coupled to each other by an arbitrary tunnel matrix. We examine the conditions for even–odd parity effects in the tunnel conductance for various junction topologies. (paper)