Efimov resonance position near a narrow Feshbach resonance in a Li6Cs133 mixture

Ang Li, Yaakov Yudkin, Paul S. Julienne, and Lev Khaykovich
Phys. Rev. A 105, 053304 – Published 12 May 2022

Abstract

In the vicinity of a narrow Feshbach resonance Efimov features are expected to be characterized by the resonance's properties rather than the van der Waals length of the interatomic potential. Although this theoretical prediction is well established by now, it still lacks experimental confirmation. Here, we apply our recently developed three-channel model [Y. Yudkin and L. Khaykovich, Efimov scenario for overlapping narrow Feshbach resonances, Phys. Rev. A 103, 063303 (2021)] to the experimental result obtained in a mass-imbalanced Li6Cs133 mixture in the vicinity of the narrowest resonance explored to date [J. Johansen, B. J. DeSalvo, K. Patel, and C. Chin, Testing universality of Efimov physics across broad and narrow Feshbach resonances, Nat. Phys. 13, 731 (2017)]. Our analysis suggests that the observed position of the Efimov resonance is dictated mainly by the resonance physics while the influence of the van der Waals tail of the interatomic potential is minor. We show that the resonance position is strongly influenced by the presence of another Feshbach resonance which significantly alters the effective background scattering length at the narrow resonance position.

  • Figure
  • Figure
  • Received 22 February 2022
  • Accepted 27 April 2022

DOI:https://doi.org/10.1103/PhysRevA.105.053304

©2022 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Ang Li1, Yaakov Yudkin1, Paul S. Julienne2, and Lev Khaykovich1

  • 1Department of Physics, QUEST Center and Institute of Nanotechnology and Advanced Materials, Bar-Ilan University, Ramat-Gan 5290002, Israel
  • 2Joint Quantum Institute, University of Maryland and NIST, College Park, Maryland 20742, USA

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Issue

Vol. 105, Iss. 5 — May 2022

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