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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster I

Q 35.16: Poster

Dienstag, 19. März 2013, 16:00–18:30, Empore Lichthof

A two-dimensional quantum register of single-atom qubits in optical microtraps — •Malte Schlosser, Sascha Tichelmann, Moritz Hambach, and Gerhard Birkl — Institut für Angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt, Germany

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 give an overview on the investigation of ⁸⁵Rb atoms in two-dimensional arrays of well over 100 individually addressable dipole traps featuring trap sizes and a tuneable 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. We present single-site resolved addressing of single spins in a reconfigurable fashion and discuss the feasibility of Rydberg based two-qubit gates in our setup.