拟合超冷共振而不拟合
Fitting ultracold resonances without a fit
摘要：
我们提出了一个数值计算程序，允许一个提取费什巴赫共振参数的数值计算，而不依赖于近似拟合程序。我们的方法是基于一个简单的分解的电抗矩阵的极点和剩余背景的贡献，并可以应用于非弹性重叠共振的一般情况。一个简单的线形重叠的非弹性共振，相当于已知的结果在特定情况下的隔离和重叠的弹性功能，也严格推导。
英文摘要：
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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