Fate of topological states in incommensurate generalized Aubry-Andr\'e   models
  We study one-dimensional optical lattices described by generalized Aubry-Andr\'e models that include both commensurate and incommensurate modulations of the hopping amplitude. This brings together two interesting features of this class of systems: Anderson localization and the existence of topological edge states. We follow changes of the single-particle energy spectrum induced by variations of the system parameters, with focus on the survival of topological states in the localized regime. 
J. C. C. Cestari, A. Foerster, M. A. Gusm\~ao
cond-mat.quant-gas