Coupled-channel pseudopotential description of the Feshbach resonance in two dimensions
- 1 June 2006
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 73 (6), 060701
- https://doi.org/10.1103/physreva.73.060701
Abstract
We derive pseudopotentials that describe the scattering between two particles in two dimensions for any partial wave , whose scattering strength is parametrized in terms of the phase shift . Using our pseudopotential, we develop a coupled-channel model with two-dimensional (2D) zero-range interactions, which describes the two-body physics across a Feshbach resonance. Our model predicts the scattering length, the binding energy, and the “closed channel molecular fraction” of two particles; these observables can be measured in experiments on ultracold quasi-2D atomic Bose and Fermi gases with present-day technology.
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