Resonance phenomena in ultracold dipole-dipole scattering

TL;DR

This paper investigates resonance phenomena in ultracold dipole-dipole scattering, providing a classification scheme and quantization condition, revealing symmetry-dependent energy variations and angular distribution changes.

Contribution

It introduces a new classification and quantitative prediction method for resonances in ultracold dipolar collisions, highlighting symmetry effects.

Findings

Bosonic systems exhibit smoother energy dependence than fermionic ones.

Resonant variations significantly affect angular distributions.

Quantitative WKB condition predicts sequences of resonant states.

Abstract

Elastic scattering resonances occurring in ultracold collisions of either bosonic or fermionic polar molecules are investigated. The Born-Oppenheimer adiabatic representation of the two-bodydynamics provides both a qualitative classification scheme and a quantitative WKB quantization condition that predicts several sequences of resonant states. It is found that the near-threshold energy dependence of ultracold collision cross sections varies significantly with the particle exchange symmetry, with bosonic systems showing much smoother energy variations than their fermionic counterparts. Resonant variations of the angular distributions in ultracold collisions are also described.