Spectral Flow and Index Theorem for Staggered Fermions
  We investigate numerically the spectral flow introduced by Adams for the staggered Dirac operator on realistic gauge configurations. We study both the unimproved and the HISQ Dirac operators. We compare the spectral flow index with the index obtained by identifying low-lying modes of large chirality. 
E. Follana, V. Azcoiti, G. Di Carlo, A. Vaquero
hep-lat