Nuclear-spin-independent short-range three-body physics in ultracold atoms.
We investigate three-body recombination loss across a Feshbach resonance in a gas of ultracold 7Li atoms prepared in the absolute ground state and perform a comparison with previously reported results of a different nuclear-spin state [N. Gross, Phys. Rev. Lett. 103, 163202 (2009)]. We extend the previously reported universality in three-body recombination loss across a Feshbach resonance to the absolute ground state. We show that the positions and widths of recombination minima and Efimov resonances are identical for both states which indicates that the short-range physics is nuclear-spin independent.
Gross
Noam
N
Department of Physics, Bar-Ilan University, Ramat-Gan, 52900 Israel.
Shotan
Zav
Z
Kokkelmans
Servaas
S
Khaykovich
Lev
L