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arXiv · 1011.5192

Hydrodynamic Expansion of a Strongly Interacting Fermi-Fermi Mixture

A. Trenkwalder·C. Kohstall·M. Zaccanti·D. Naik·A. I. Sidorov·F. Schreck·R. Grimm
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Abstract

We report on the expansion of a Fermi-Fermi mixture of Li-6 and K-40 atoms under conditions of strong interactions realized near the center of an interspecies Feshbach resonance. We observe two different phenomena of hydrodynamic behavior. The first one is the well-known inversion of the aspect ratio. The second one is a collective expansion, where both species stick together and despite of their different masses expand jointly. Our work constitutes a first step to explore the intriguing many-body physics of this novel system.

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A. Trenkwalder, C. Kohstall, M. Zaccanti, D. Naik, A. I. Sidorov, F. Schreck, R. Grimm. 2011-03-16. Hydrodynamic Expansion of a Strongly Interacting Fermi-Fermi Mixture. https://doi.org/10.1103/physrevlett.106.115304

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