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Updated: Apr 25, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Three-body recombination at vanishing scattering lengths in an ultracold bose gas
Zav Shotan1, Olga Machtey1, Servaas Kokkelmans1
1Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, Netherlands.
Abstract:
We report on measurements of three-body recombination loss rates in an ultracold gas of ^{7}Li atoms in the extremely nonuniversal regime where the two-body scattering length vanishes. We show that the loss rate coefficient is well defined and can be described by two-body parameters only: the scattering length a and the effective range R_{e}. We find the rate to be energy independent, and, by connecting our results with previously reported measurements in the universal limit, we cover the behavior of the three-body recombination rate in the whole range from weak to strong two-body interactions. We identify a nontrivial magnetic field value in the nonuniversal regime where the rate should be suppressed.
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