Exact two-body solutions and quantum defect theory of two-dimensional dipolar quantum gas

Abstract

In this paper, we provide the two-body exact solutions of the two-dimensional (2D) Schrödinger equation with isotropic interactions. An analytic quantum defect theory is constructed based on these solutions and it is applied to investigate the scattering properties as well as two-body bound states of an ultracold polar molecules confined in a quasi-2D geometry. Interestingly, we find that for the attractive case, the scattering resonance happens simultaneously in all partial waves, which has not been observed in other systems. The effect of this feature on the scattering phase shift across such resonances is also illustrated.