Abstract
The definition of the scattering volume for -wave collisions needs to be generalized in the presence of dipolar interactions for which the potential decreases with the interparticle separation as . Here, we propose a way to define the scattering volume characterizing the short-range interactions in odd-parity waves, by analyzing the -wave component of the two-body threshold wave function. Our approach uses an asymptotic model and introduces explicitly the anisotropic dipole-dipole interaction, which governs the ultracold collision dynamics at long range. The short-range interactions, which are essential to describe threshold resonances, are taken into account by a single parameter related to the nodal structure of the wave functions at short distances.
- Received 8 August 2018
- Revised 31 January 2019
DOI:https://doi.org/10.1103/PhysRevA.99.032709
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