1206.2134 (Fabian Hassler et al.)

Strongly interacting Majorana modes in an array of Josephson junctions    [PDF]

Fabian Hassler, Dirk Schuricht

An array of superconducting islands with semiconducting nanowires in the right regime provides a macroscopic implementation of Kitaev's toy model for Majorana wires. We show that a capacitive coupling between adjacent islands leads to an effective interaction between the Majorana modes. We demonstrate that even though strong repulsive interaction eventually drive the system into a Mott insulating state the competition between the (trivial) band-insulator and the (trivial) Mott insulator leads to an interjacent topological insulating state for arbitrary strong interactions.

View original: http://arxiv.org/abs/1206.2134