Physics – Condensed Matter – Quantum Gases
Scientific paper
2010-11-03
New Journal of Physics 13 (2011) 043007
Physics
Condensed Matter
Quantum Gases
15 pages, 6 figures
Scientific paper
10.1088/1367-2630/13/4/043007
We report on the local probing and preparation of an ultracold Fermi gas on the length scale of one micrometer, i.e. of the order of the Fermi wavelength. The essential tool of our experimental setup is a pair of identical, high-resolution microscope objectives. One of the microscope objectives allows local imaging of the trapped Fermi gas of 6Li atoms with a maximum resolution of 660 nm, while the other enables the generation of arbitrary optical dipole potentials on the same length scale. Employing a 2D acousto-optical deflector, we demonstrate the formation of several trapping geometries including a tightly focussed single optical dipole trap, a 4x4-site two-dimensional optical lattice and a 8-site ring lattice configuration. Furthermore, we show the ability to load and detect a small number of atoms in these trapping potentials. A site separation of down to one micrometer in combination with the low mass of 6Li results in tunneling rates which are sufficiently large for the implementation of Hubbard-models with the designed geometries.
Esslinger Tilman
Meineke Jakob
Moritz Henning
Mueller Torben
Zimmermann Bruno
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