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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster II

Q 30.7: Poster

Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster

Towards the observation of second sound in a strongly interacting Fermi gas — •Edmundo R. Sánchez Guajardo^1,2, Christoph Kohstall^1,2, Stefan Riedl^1,2, Leonid Sidorenkov¹, Johannes Hecker Denschlag¹, and Rudolf Grimm^1,2 — 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.