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- W4318773896 abstract "We analyze the change in the hyperradial Efimovian three-body potential as the two-body interaction is tuned from the broad to narrow Feshbach resonance regime. Here, it is known from both theory and experiment that the three-body dissociation scattering length ${a}_{ensuremath{-}}$ shifts away from the universal value of $ensuremath{-}9.7phantom{rule{4pt}{0ex}}{r}_{mathrm{vdW}}$, with ${r}_{mathrm{vdW}}=frac{1}{2}{(m{C}_{6}/{ensuremath{hbar}}^{2})}^{1/4}$ the two-body van der Waals range. We model the three-body system using a separable two-body interaction that takes into account the full zero-energy behavior of the multichannel wave function. We find that the short-range repulsive barrier in the three-body potential characteristic for single-channel models remains universal for narrow resonances, while the change in the three-body parameter originates from a strong decrease in the potential depth. From an analysis of the underlying spin structure we further attribute this behavior to the dominance of the two-body interaction in the resonant channel compared to other nonresonant interactions." @default.
- W4318773896 created "2023-02-02" @default.
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- W4318773896 date "2023-02-01" @default.
- W4318773896 modified "2023-10-03" @default.
- W4318773896 title "Efimovian three-body potential from broad to narrow Feshbach resonances" @default.
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- W4318773896 doi "https://doi.org/10.1103/physreva.107.023301" @default.
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