Hydrodynamic Expansion of a Strongly Interacting Fermi-Fermi Mixture

Details Hydrodynamic Expansion of a Strongly Interacting Fermi-Fermi Mixture Hydrodynamic Expansion of a Strongly Interacting Fermi-Fermi Mixture

2010-11-23

arxiv.org/abs/1011.5192v2

Phys. Rev. Lett. 106, 115304 (2011)

Physics

Condensed Matter

Quantum Gases

Scientific paper

10.1103/PhysRevLett.106.115304

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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