Hannover 2010 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 38: Quantum Gases: Bosons III / Lattices I
Q 38.5: Vortrag
Mittwoch, 10. März 2010, 17:30–17:45, E 001
Single site addressability in optical lattices — •Christof Weitenberg1, Manuel Endres1, Jacob Sherson1, Marc Cheneau1, Rosa Glöckner1, Ralf Labouvie1, Immanuel Bloch1,2, and Stefan Kuhr1 — 1Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Str. 1, 85748 Garching — 2Ludwig-Maximilians-Universität, Fakultät für Physik, Schellingstr. 4, 80799 München
Single site resolution in short-wavelength optical lattices, which have a significant tunnel coupling, is a challenging task. We prepare a BEC of rubidium atoms in a 3D lattice of 532 nm spacing. Using the 5S1/2 to 6P3/2 transition at 420nm, our imaging system (NA=0.7) will yield a resolution of 380nm and there-fore allow single site resolved detection and manipulation.
So far we have taken in trap fluorescence images with a resolution of 700 nm using the 5S1/2 to 5P3/2 transition at 780nm and demonstrated the micro-manipulation of a few atoms with a tightly focused dipole trap. To extract one or a few slices and remove the atoms that are out of the depth of focus we use microwave transitions in a magnetic field gradient.
The single site resolution will open up a new class of experiments in quantum simulation of strongly correlated systems - like the in-situ observation of the Mott insulator or the investigation of non-equilibrium phenomena - and in quantum information processing - like local spin manipulation or quantum gates with Rydberg atoms.