Efimov physics in two nuclear-spin sublevels of bosonic lithium is studied and it is shown that the positions and widths of recombination minima and Efimov resonances are identical for both states within the experimental errors, which indicate that the short-range physics is nuclear-spin independent. We also find that the Efimov features are universally related across Feshbach resonances. These applied magnetic field which we achieve by characterization of the two broad Feshbach resonances in the different states by means of rf-spectroscopy of weakly bound molecules. By fitting the binding energies numerically with a coupled channels calculation we precisely determine the absolute positions of the Feshbach resonances and the values of the singlet and triplet scattering lengths.
|Translated title of the contribution||Study of Efimov physics in two nuclear-spin sublevels of 7Li|
|Number of pages||9|
|Journal||Comptes Rendus Physique|
|State||Published - Jan 2011|
Bibliographical noteFunding Information:
This work was supported, in part, by the Israel Science Foundation and by the Netherlands Organization for Scientific Research (NWO). N.G. is supported by the Adams Fellowship Program of the Israel Academy of Sciences and Humanities.
- Efimov effect
- Feshbach resonance
- Nuclear spin