Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 41: Quanteninformation: Atome und Ionen 1

Q 41.2: Talk

Thursday, March 15, 2012, 11:00–11:15, V7.02

Scalable architecture for quantum information processing with atoms in optical micro-structures — •Malte Schlosser, Sascha Tichelmann, Moritz Hambach, and Gerhard Birkl — Institut für Angewandte Physik, Technische Universität Darmstadt, Schlossgartenstraße 7, 64289 Darmstadt, Germany

The ability to synchronously investigate multi-component quantum systems in multi-site architectures is fostering some of the most active research in the investigation of ultra-cold atomic quantum gases and quantum information processing (QIP). For this purpose, we have introduced the application of micro-fabricated optical elements for atom optics and QIP with atoms.

We present recent progress towards the realization of a scalable architecture for QIP using neutral atoms in two-dimensional (2D) arrays of optical microtraps as qubit registers. This approach is simultaneously targeting the important issues of single-site addressability and scalability, and provides versatile configurations for quantum state storage, manipulation, and retrieval. We present the initialization and coherent one-qubit rotation of 2D registers of individually addressable qubits, the coherent transport of atomic quantum states in a scalable quantum shift register, the sub-Poissonian loading of 2D qubit registers with 0 or 1 atom, and discuss the feasibility of two-qubit gates in 2D architectures.