Tunneling and orthogonality catastrophe in the topological mechanisms of superconductivity

We compute the angular dependence of the order parameter and tunneling amplitude in a model exhibiting topological superconductivity and sketch its derivation as a model of a doped Mott insulator. We show that ground states differing by an odd number of particles are orthogonal and the order parameter is in the d representation, although the gap in the electronic spectrum has no nodes. We also develop an operator algebra that allows one to compute off-diagonal correlation functions.