Orateur
Dr
Servaas Kokkelmans
(Eindhoven University of Technology)
Description
We observed the existence of a universal regime for Efimov trimers
through three-body recombination loss in the vicinity of a Feshbach
resonance, for ultracold Li-7 atoms. The reported results crucially
depend on a careful mapping of the scattering length on the magnetic
field. We characterize two broad Feshbach resonances in different spin
states via the binding energies of weakly bound molecules, created by
radio-frequency association, by making use of a theoretical coupled
channels analysis.
We also investigate the possibility to stabilize Efimov trimers in
optical lattices. We present universal solutions of three bosons in a
harmonic potential, for all ranges of the scattering length and
harmonic oscillator length. We compare our results to the limiting
cases, such as that of a vanishing trapping potential. The combination
of being able to tune both length parameters gives rise to quite
distinct solutions of these trimers, and allows for minimizing the
inelastic losses.
Author
Dr
Servaas Kokkelmans
(Eindhoven University of Technology)
