2024
DOI: 10.1007/s00601-024-01943-z
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Effect of Background Scattering on Efimov Scenario for Overlapping Narrow Feshbach Resonances

Fatema Hamodi-Gzal,
Lev Khaykovich

Abstract: Efimov physics in the vicinity of two overlapping narrow Feshbach resonances can be explored within a framework of a three-channel model where a non-interacting open channel is coupled to two closed molecular channels. Here, we determine how it compares to the extended two-channel model, which includes an open channel with finite background scattering and a single molecular channel. We identify the parameter range in which the three-channel model surpasses the extended two-channel model. Furthermore, the three… Show more

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