Testing universality of Efimov physics across broad and narrow Feshbach resonances
Abstract
Efimov physics is a universal phenomenon arising in quantum three-body systems. For systems with resonant two-body interactions, Efimov predicted an infinite series of three-body bound states with geometric scaling symmetry. These Efimov states were first observed in cold Cs atoms and have since been reported in a variety of atomic systems. While theories predict non-universal behavior for narrow Feshbach resonances, experiments on Efimov resonances are so far consistent with predictions based on universal theories. Here we directly compare the Efimov spectra in a Li-Cs mixture near two Feshbach resonances which are very different in their resonance strengths but otherwise almost identical. Our result shows a clear dependence of the Efimov resonance positions on Feshbach resonance strength and a clear departure from the universal prediction for the narrow Feshbach resonance.
Cite
@article{arxiv.1612.05169,
title = {Testing universality of Efimov physics across broad and narrow Feshbach resonances},
author = {Jacob Johansen and B. J. DeSalvo and Krutik Patel and Cheng Chin},
journal= {arXiv preprint arXiv:1612.05169},
year = {2017}
}
Comments
4 pages, 4 figures, 1 table main text; 2 pages, 1 figure methods; 1 page, 1 figure, 2 tables supplement