Erlangen 2018 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 51: Poster: Quantum Optics and Photonics IV
Q 51.15: Poster
Mittwoch, 7. März 2018, 16:15–18:15, Redoutensaal
Local control of transport in an atomic quantum wire — •Philipp Fabritius1, Samuel Häusler1, Martin Lebrat1, Dominik Husmann1, Laura Corman1, Jean-Philippe Brantut2, and Tilman Esslinger1 — 1Institute for Quantum Electronics, ETH Zürich, 8093 Zürich, Switzerland — 2Institute of Physics, École Polytechnique Fédérale de Lausanne, 1015 Lausanne, Switzerland
We demonstrate the local control of fermionic lithium atoms flowing through a one-dimensional structure by imprinting holographically shaped optical potentials with a high-resolution microscope. Similar to the scanning gate technique applied to solid-state devices we image the transport through a quantum wire at the scale of the Fermi wavelength by scanning the position of a sharp, repulsive optical gate. Imprinting complex structures such as a lattice enables us to study the metal-insulator transition in an interacting one-dimensional Fermi gas. We find that the insulating state is robust even for strong attractive interactions, which supports the existence of a Luther-Emery liquid in the one-dimensional wire.
The flexibility of our setup makes it possible to project additional structures onto a wire or a quantum point contact. In particular close-to-resonance light can be used to implement dissipative lattices or a spin valve.