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Updated: May 24, 2026

Cooling an Optically Trapped Ultracold Fermi Gas by Periodical Driving
Published on: March 30, 2017
Thermodynamics of a Bose-Einstein condensate with free magnetization
B Pasquiou1, E Maréchal, L Vernac
1Laboratoire de Physique des Lasers, UMR 7538 CNRS, Université Paris 13, 99 Avenue J-B Clément, 93430 Villetaneuse, France.
Abstract:
We study thermodynamic properties of a gas of spin 3(52)Cr atoms across Bose-Einstein condensation. Magnetization is free, due to dipole-dipole interactions. We show that the critical temperature for condensation is lowered at extremely low magnetic fields, when the spin degree of freedom is thermally activated. The depolarized gas condenses in only one spin component, unless the magnetic field is set below a critical value, below which a nonferromagnetic phase is favored. Finally, we present a spin thermometry efficient even below the degeneracy temperature.
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