Simple Models with Non-Abelian Moduli on Topological Defects
  I explain how conventional topological defects -- the Abrikosov-Nielsen-Olesen (ANO) string and domain walls -- can acquire non-Abelian moduli localized on their world sheets. The set-up is conceptually similar and generalizes that used by Witten for cosmic strings. 
M. Shifman
hep-th