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Atomic physics

Spin drag in a perfect fluid

Beautiful experiments in an ultracold, strongly interacting atomic Fermi gas reveal that, unexpectedly, unpaired atomic spins flow in the system with the maximum resistance permitted by the laws of quantum mechanics. See Letter p.201

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Figure 1: Bouncing atomic clouds in an optical trap.


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Correspondence to John E. Thomas.

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Thomas, J. Spin drag in a perfect fluid. Nature 472, 172–173 (2011).

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