Abstract
Majorana bound states (MBS) are zero energy point-like excitations that support robust non-local storage of quantum information and non-abelian unitary operations. MBS can arise at lattice defects, such as disclinations and dislocations, of a topological crystalline superconductor. This relies on a lattice symmetry protected topology in the bulk. We completely classify lattice rotation symmetric BCS superconductors in two dimensions, and propose a Z2-topological index that determines the MBS number parity at a general disclination-dislocation composite defect. This predicts the appearance of MBS at lattice defects in superconducting strontium ruthenate and doped graphene.
Coffee and tea will be served 20 minutes prior to the seminar.