1. Fitting ultracold resonances without a fit
- Author
-
Simoni, Andrea
- Subjects
Physics - Atomic Physics - Abstract
We present a numerical procedure allowing one to extract Feshbach resonance parameters from numerical calculations without relying on approximate fitting procedures. Our approach is based on a simple decomposition of the reactance matrix in terms of poles and residual background contribution, and can be applied to the general situation of inelastic overlapping resonances. A simple lineshape for overlapping inelastic resonances, equivalent to known results in the particular cases of isolated and overlapping elastic features, is also rigorously derived., Comment: 16 pages, 5 figures
- Published
- 2021
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