Spin diffusion in trapped clouds of strongly interacting cold atoms

Details Spin diffusion in trapped clouds of strongly interacting cold atoms Spin diffusion in trapped clouds of strongly interacting cold atoms

2011-09-26

arxiv.org/abs/1109.5709v2

Phys. Rev. Lett. 107, 255302 (2011)

Physics

Condensed Matter

Quantum Gases

4 pages, 6 figures, minor modifications to the text and figures in 2. version

Scientific paper

10.1103/PhysRevLett.107.255302

We show that puzzling recent experimental results on spin diffusion in a strongly interacting atomic gas may be understood in terms of the predicted spin diffusion coefficient for a generic strongly interacting system. Three important features play a central role: a) Fick's law for diffusion must be modified to allow for the trapping potential, b) the diffusion coefficient is inhomogeneous, due to the density variations in the cloud and c) the diffusion approximation fails in the outer parts of the cloud, where the mean free path is long.

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