Anomalous Spin segregation in a weakly interacting two-component Fermi gas

Abstract

We explain the spin segregation seen at Duke in a two-component gas of 6Li [Du, Luo, Clancy and Thomas, Phys. Rev. Lett. 101,150401 (2008)] as a mean-field effect describable via a collisionless Boltzmann equation. As seen in experiments, we find that slight differences in the trapping potentials in the two spin states drive small spin currents. Hartree-Fock type interactions convert these currents into a redistribution of populations in energy space, and consequently a long lived spin texture develops. We explore the interaction strength dependence of these dynamics, finding close agreement with experiment.

4 pages, 3 figures, published version. Text modified to include qualitative discussion of spin-segregation effect; 1 figure added

References in corpus (5)

• Observation of anomalous spin-state segregation in a trapped ultra-cold vapor
• Observation of Anomalous Spin Segregation in a Trapped Fermi Gas
• Internal state conversion in ultracold gases
• Internal waves and synchronized precession in a cold vapor
• Longitudinal spin waves in a dilute Bose gas

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