Hamburg 2009 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 30: Poster II
Q 30.7: Poster
Tuesday, March 3, 2009, 16:30–19:00, VMP 9 Poster
Towards the observation of second sound in a strongly interacting Fermi gas — •Edmundo R. Sánchez Guajardo1,2, Christoph Kohstall1,2, Stefan Riedl1,2, Leonid Sidorenkov1, Johannes Hecker Denschlag1, and Rudolf Grimm1,2 — 1Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, Österreich — 2Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, 6020 Innsbruck, Österreich
Second sound is predicted to occur when two coexisting hydrodynamic fluids, one of them a superfluid, oscillate out of phase with respect to each other. In a strongly interacting Fermi gas such a system is realized close to a Feshbach resonance, where both the superfluid and the normal states are hydrodynamic. The low-lying collective modes previously studied in this Fermi gas correspond to in-phase oscillations of the two fluids. We discuss possible scenarios to excite and detect out-of-phase oscillations and thus to probe phenomena related to second sound.