Dissecting zero modes and bound states on BPS vortices in   Ginzburg-Landau superconductors
  In this paper the zero modes of fluctuation of cylindrically symmetric self-dual vortices are analyzed and described in full detail. These BPS topological defects arise at the critical point between Type II and Type I superconductors, or, equivalently, when the masses of the Higgs particle and the vector boson in the Abelian Higgs model are equal. In addition, novel bound states of Higss and vector bosons trapped by the self-dual vortices at their core are found and investigated. 
Alberto Alonso-Izquierdo, Wifredo Garcia Fuertes, Juan Mateos Guilarte
hep-th