Multichannel quantum-defect theory for slow atomic collisions
Bo Gao, Eite Tiesinga, Carl J. Williams, Paul S. Julienne
Abstract
We present a multichannel quantum-defect theory for slow atomic collisions that takes advantages of the analytic solutions for the long-range potential, and both the energy and the angular-momentum insensitivities of the short-range parameters. The theory provides an accurate and complete account of scattering processes, including shape and Feshbach resonances, in terms of a few parameters such as the singlet and the triplet scattering lengths. As an example, results for 23Na-23Na scattering are presented and compared close-coupling calculations.
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