@article{BudichTrauzettel2013,
  author    = {Budich, Jan Carl and Trauzettel, Bj{\"o}rn},
  title     = {Z(2) Green's function topology of Majorana wires},
  series = {New Journal of Physics},
  volume    = {15},
  journal   = {New Journal of Physics},
  number    = {065006},
  doi       = {10.1088/1367-2630/15/6/065006},
  url       = {http://nbn-resolving.de/urn:nbn:de:bvb:20-opus-129751},
  year      = {2013},
  abstract  = {We represent the Z2 topological invariant characterizing a one-dimensional topological superconductor using a Wess-Zumino-Witten dimensional extension. The invariant is formulated in terms of the single-particle Green's function which allows us to classify interacting systems. Employing a recently proposed generalized Berry curvature method, the topological invariant is represented independent of the extra dimension requiring only the single-particle Green's function at zero frequency of the interacting system. Furthermore, a modified twisted boundary conditions approach is used to rigorously define the topological invariant for disordered interacting systems.},
  language  = {en}
}