Optical Flux Lattices for Ultracold Atomic Gases
  We show that simple laser configurations can give rise to "optical flux lattices", in which optically dressed atoms experience a periodic effective magnetic flux with high mean density. These potentials lead to narrow energy bands with non-zero Chern number. Optical flux lattices will greatly facilitate the achievement of the quantum Hall regime for ultracold atomic gases. 
N. R. Cooper
cond-mat.quant-gas quant-ph