Dipolar Gases — Theory

Abstract

In this chapter, we briefly review some important aspects of the theory of dipolar gases, focusing on those aspects in which the physics of dipolar gases differs qualitatively from that of non-dipolar ones.

Superfluidity and density order in a bilayer extended Hubbard model

“…a supersolid phase. where a S is the s-wave scattering length and U (r) is the dipole-dipole interaction 9 , which in the case of all dipoles being aligned reads…”

“…There, the possibility to control interand intralayer tunnelings (hoppings) has been available for some time [3,4] but the interactions have been limited to on-site intralayer type. The interesting new development are dipolar atoms and molecules [5][6][7][8][9][10] that provide long-range dipole-dipole forces and thereby bring in the possibility of interlayer interactions. In this paper, we predict within the bilayer extended Hubbard model a competition of density order and two types of superfluids: an interlayer one analogous to exciton condensates, and an intralayer superfluid that is induced by interlayer interactions.…”

Topological states with broken translational and time-reversal symmetries in a honeycomb-triangular lattice

“…In experiments, there are many ways to tune the interparticle interactions from attractive to repulsive, such as Feshbach resonances [45]. Moreover, there are ways to tune the on-site and nearest-neighbor (NN) interactions independently of each other [46,47]. Thus, we choose to consider attractive on-site and nearest-neighbor interactions.…”