Topological phase transitions on a triangular optical lattice with   non-Abelian gauge fields
  We study the mean-field BCS-BEC evolution of a uniform Fermi gas on a single-band triangular lattice, and construct its ground-state phase diagrams, showing a wealth of topological quantum phase transitions between gapped and gapless superfluids that are induced by the interplay of an out-of-plane Zeeman field and a generic non-Abelian gauge field. 
M. Iskin
cond-mat.quant-gas cond-mat.str-el cond-mat.supr-con