Unconventional Superfluidity in Ultracold Dipolar Gases

Abstract

In this manuscript, we discuss the emergence of p-wave superfluidity in a dipolar Fermi gas confined in a double layer array of parallel optical lattices in two dimensions. The dipole moments of the molecules placed at the sites of the optical lattices, separated a distance L and pointing in opposite directions produce an effective attractive interaction among them, except between those dipoles situated one on top of the other. Such interaction between dipoles is precisely the origin of the non-conventional superfluid state. We present the analysis for the ground state of the many-body system within the mean-field scheme. In particular, we study the stable regions, as a function of the system parameters, namely the effective interaction between dipoles and the filling factor n, for which the superfluid state can exist. Following the BKT scheme, we estimate the critical temperature of the superfluid state.

Topological supersolidity of dipolar Fermi gases in a spin-dependent optical lattice

“…Since the dipole-dipole coupling is strongest between nearest neighbors, and decays as a function of distance between lattice sites to the order 1 |r| 3 , we consider the pairing to be between nearest neighbors [26,[59][60][61]. We describe the superfluid order parameter as Δ i j = V i j c i c j δ j,i+ê λ with λ = x, y.…”