Hamburg 2009 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 30: Poster II

Q 30.37: Poster

Dienstag, 3. März 2009, 16:30–19:00, VMP 9 Poster

Quantum Information Processing with Atoms in Arrays of Dipole Potentials — Jens Kruse, Malte Schlosser, Christian Gierl, Christoph Ewen, •Peter Schauss, and Gerhard Birkl — Institut für Angewandte Physik, Technische Universität Darmstadt, Schloßgartenstr. 7, 64289 Darmstadt

The coherent control of the internal and external quantum states of ultra-cold neutral atoms represents an important experimental approach towards quantum information processing. In our experiment, we use two-dimensional arrays of optical micro-potentials created by micro-fabricated lens arrays as the architecture for a scalable quantum processor. For the qubit manipulation, we apply coherent Raman coupling to the hyperfine ground states of the trapped ⁸⁵Rb atoms.
Due to the large lateral separation of neighbouring potential wells our high resolution detection system allows for the determination of atom numbers of separated trap sites.
We demonstrate the versatile site-selective addressability by implementing a liquid crystal display as a spatial light modulator (SLM) in front of a microlens array. By this we control the depth of each potential well separately and produce arbitrary atom distributions. Furthermore we use the SLM to pattern the intensity distribution of our laser field for qubit manipulation and demonstrate the flexible site-specific initialization and coherent manipulation of separated qubits in two-dimensional trap arrays.