Stuttgart 2012 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 40: Poster: Ultra-cold atoms, ions and BEC

A 40.33: Poster

Donnerstag, 15. März 2012, 16:30–19:00, Poster.V

Conduction of ultracold Fermions through a mesoscopic channel — •Sebastian Krinner, Jakob Meineke, Jean-Philippe Brantut, David Stadler, and Tilman Esslinger — Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland

We present a conduction measurement of ultracold Fermions flowing through a quasi two-dimensional channel which is connected to two macroscopic atom reservoirs. A controlled imbalance of the atom number in the two reservoirs induces a current from one side to the other. We observe this current as a function of time and see a characteristic decay of the atom number imbalance to its equilibrium position. In addition we measure in-situ the density distribution in the channel for two different situations: a purely ballistic channel and a channel containing disorder. Eventhough the macroscopic atom current is the same, we observe a very different local behaviour of the atomic density in the channel and at the contacts.