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Updated: Sep 28, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Decay of an ultracold fermionic lithium gas near a Feshbach resonance
K Dieckmann1, C A Stan, S Gupta
1Department of Physics, MIT-Harvard Center for Ultracold Atoms, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
Abstract:
We studied the magnetic field dependence of the inelastic decay of an ultracold, optically trapped fermionic 6Li gas of different spin compositions. The spin mixture of the two lowest hyperfine states showed two decay resonances at 550 and 680 G, consistent with the predicted Feshbach resonances for elastic s-wave collisions. The observed lifetimes of several hundred ms are much longer than the expected time for Cooper pair formation and the phase transition to superfluidity in the vicinity of the Feshbach resonance.
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