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Article Dans Une Revue New Journal of Physics Année : 2021

Fitting ultracold resonances without a fit

Résumé

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.
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Dates et versions

hal-03464488 , version 1 (03-12-2021)
hal-03464488 , version 2 (03-12-2021)

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Andrea Simoni. Fitting ultracold resonances without a fit. New Journal of Physics, 2021, 23 (11), pp.113023. ⟨10.1088/1367-2630/ac3442⟩. ⟨hal-03464488v2⟩
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