Journal
PHYSICAL REVIEW LETTERS
Volume 103, Issue 20, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.103.200403
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Funding
- EPSRC [EP/E018130/1, EP/F032773/1] Funding Source: UKRI
- Engineering and Physical Sciences Research Council [EP/E018130/1, EP/F032773/1] Funding Source: researchfish
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Alongside superfluidity, itinerant (Stoner) ferromagnetism remains one of the most well-characterized phases of correlated Fermi systems. A recent experiment has reported the first evidence for novel phase behavior on the repulsive side of the Feshbach resonance in a two-component ultracold Fermi gas. By adapting recent theoretical studies to the atomic trap geometry, we show that an adiabatic ferromagnetic transition would take place at a weaker interaction strength than is observed in experiment. This discrepancy motivates a simple nonequilibrium theory that takes account of the dynamics of magnetic defects and three-body losses. The formalism developed displays good quantitative agreement with experiment.
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