Topological superfluid in a fermionic bilayer optical lattice Ya-Jie Wu, Jing He, Chun-Li Zang and Su-Peng Kou Eur. Phys. J. B, 86 3 (2013) 105 Published online: 20 March 2013 DOI: 10.1140/epjb/e2013-31045-1