Topological p(x) + i p(y) superfluid phase of a dipolar Fermi gas in a two-dimensional optical lattice

In a dipolar Fermi gas, the anisotropic interaction between electric dipoles can be turned into an effectively attractive interaction in the presence of a rotating electric field. We show that the topological p(x) + ip(y) superfluid phase can be realized in a single-component dipolar Fermi gas trapped in a two-dimensional square optical lattice with this attractive interaction at low temperatures. The p(x) + ip(y) superfluid state has potential applications for topological quantum computing. We obtain the phase diagram of this system at zero temperature. When the interaction is weak, the p-wave superfluid state is stable for most filling factors except near half filling, where phase separation takes place. In the weak-coupling limit, the phase-separation region vanishes. When the interaction strength is above a threshold, the system is phase separated for any filling factor 0 < n < 1. The transition temperature of the p(x) + ip(y) superfluid state is estimated and the implication for experiments is discussed.OpticsPhysics, Atomic, Molecular & ChemicalSCI(E)EI4ARTICLE3null8