Dresden 2011 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 26: Quantum Information: Atoms and Ions 2

Q 26.1: Vortrag

Mittwoch, 16. März 2011, 10:30–11:00, HÜL 386

Scalable architecture for quantum information processing with neutral atoms — •Malte Schlosser, Sascha Tichelmann, Jens Kruse, and Gerhard Birkl — Institut für Angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt

Optical dipole potentials such as arrays of focused laser beams provide flexible geometries for the synchronous investigation of multiple atomic quantum systems, as studied e.g. in the fields of quantum degenerate gases, quantum information processing, and quantum simulation with neutral atoms.
In our work, we focus on the implementation of trapping geometries based on microfabricated optical elements. This approach allows us to develop flexible and integrable configurations for quantum state storage and manipulation, simultaneously targeting the important issues of single-site addressing and scalability.
We report on the investigation of ⁸⁵Rb atoms in two-dimensional arrays of individually addressable dipole traps featuring trap sizes and a tunable site-separation in the single micrometer regime. Advanced schemes for atom number resolved detection with high efficiency and reliability allow us to probe small ensembles and even single atoms stored in the microtrap array. For single atom preparation we utilize light assisted collisions to improve loading efficiencies while eliminating multi-atom events. Spatial light modulators and techniques for coherent quantum state transport complement our two-dimensional architecture of highly controllable atomic quantum systems.