Z(2) Green's function topology of Majorana wires
2013 (English)In: New Journal of Physics, ISSN 1367-2630, Vol. 15, 065006- p.Article in journal (Refereed) Published
We represent the Z(2) 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.
Place, publisher, year, edition, pages
2013. Vol. 15, 065006- p.
IdentifiersURN: urn:nbn:se:su:diva-92009DOI: 10.1088/1367-2630/15/6/065006ISI: 000319898200003OAI: oai:DiVA.org:su-92009DiVA: diva2:637546
FunderSwedish Research Council