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Updated: Aug 24, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Collective molecule formation in a degenerate Fermi gas via a Feshbach resonance
Juha Javanainen1, Marijan Kostrun, Yi Zheng
1Department of Physics, University of Connecticut, Storrs, Connecticut 06269-3046, USA.
Abstract:
We model collisionless collective conversion of a degenerate Fermi gas of atoms into bosonic molecules via a Feshbach resonance, treating the bosonic molecules as a classical field and seeding the pairing amplitudes with random phases. A dynamical instability of the Fermi sea against association with molecules drives the conversion. The model qualitatively reproduces several experimental observations [Regal et al., Nature (London), (2003)]. We predict that the initial temperature of the Fermi gas sets the limit for the efficiency of atom-molecule conversion.
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