Hannover 2016 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 53: Quantum Gases: Fermions I
Q 53.3: Vortrag
Donnerstag, 3. März 2016, 15:00–15:15, e001
Imaging transport of neutral atoms using a scanning probe microscope — •Samuel Häusler1, Sebastian Krinner1, Dominik Husmann1, Martin Lebrat1, Charles Grenier2, Shuta Nakajima3, Jean-Philippe Brantut1, and Tilman Esslinger1 — 1Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland — 2Laboratoire de Physique, ENS de Lyon, 69364 Lyon, France — 3Department of Physics, Graduate School of Science, Kyoto University, Kyoto 606-8502, Japan
We implement a scanning probe technique to image the transport of ultracold fermions through a quantum point contact. A “tip” is created with a tightly focused, repulsive laser beam, and moved and shaped using a Digital Mirror Device. By scanning its position and monitoring the subsequent variations of conductance, we retrieve spatially resolved information on the transport, like in scanning gate microscopy applied to solid state devices [1].
The scanning gate pictures are compared with ab-initio simulations for a non-interacting Fermi gas. The method is readily extended to strongly interacting fermions where superfluidity enhances the contrast.
[1] M.A. Eriksson, et al. Appl. Phys. Lett. 69 671 (1996)