2021/08/10 by Andrea Simoni
Engineering · Physics and Astronomy · #Adhesion, Friction, and Surface Interactions #Cold Atom Physics and Bose-Einstein Condensates #Computer science #Nonlinear Photonic Systems #Physics #Quantum #Quantum mechanics #Ultracold atom #physics.atom-ph
paper · pdf · doi:10.1088/1367-2630/ac3442
published in New Journal of Physics 23(11), 113023 (IOP Publishing) · 16 pages, 5 figures
arxiv created 2021/08/10 · openalex publication_date 2021/10/28 · arxiv updated 2021/12/08 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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.