Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 17: Fermi Quantum Gas
Q 17.1: Vortrag
Dienstag, 15. März 2011, 10:30–10:45, BAR Schön
Exploring Many-Body Interaction in a Strongly Interacting 6Li-40K Fermi-Fermi Mixture — •Christoph Kohstall1,2, Andreas Trenkwalder1, Matteo Zaccanti1, Devang Naik1, Andrei Sidorov3, Florian Schreck1, and Rudolf Grimm1,2 — 1Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Innsbruck, Austria — 2Institut für Experimentalphysik und Zentrum für Quantenphysik, Universität Innsbruck, Innsbruck, Austria — 3Swinburne University of Technology, Melbourne, Australia
We have realized the first strongly interacting 6Li-40K Fermi-Fermi mixture by means of an interspecies Feshbach resonance. Measurements on the expansion of this resonantly interacting Fermi-Fermi mixture reveal its collisionally hydrodynamic behavior [1]. In present experiments, we explore the many-body interaction by determining the interaction energy, which we extract from expansion measurements and from radio frequency spectroscopy. These studies will shed light on the formation dynamics of polarons or pseudo-gap pairs in the strongly interacting regime. An intriguing prospect is to individually control the optical potentials of the two components, opening the new possibility to investigate systems with selectively adjusted Fermi surfaces or with mixed dimensionality.
[1] A. Trenkwalder et al., arXiv:1011.5192 (2010).