Spin drag of a fermi gas in a harmonic trap

O. Goulko*, F. Chevy, C. Lobo

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Using a Boltzmann equation approach, we analyze how the spin drag of a trapped interacting fermionic mixture is influenced by the nonhomogeneity of the system in a classical regime where the temperature is much larger than the Fermi temperature. We show that for very elongated geometries, the spin damping rate can be related to the spin conductance of an infinitely long cylinder. We characterize analytically the spin conductance both in the hydrodynamic and collisionless limits and discuss the influence of the velocity profile. Our results are in good agreement with recent experiments and provide a quantitative benchmark for further studies of spin drag in ultracold gases.

Original languageEnglish
Article number190402
JournalPhysical Review Letters
Issue number19
StatePublished - 4 Nov 2013
Externally publishedYes


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