Stuttgart 2012 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 35: Poster 2

Q 35.53: Poster

Mittwoch, 14. März 2012, 16:30–19:00, Poster.I+II

Fast and Coherent Manipulation of Trapped Ion Qubits — •Samuel T. Dawkins, Konstantin Ott, Andreas Walther, Alex Wiens, Ulrich Poschinger, Kilian Singer, and Ferdinand Schmidt-Kaler — QUANTUM, Institut für Phyzik, Johannes-Gutenberg Universität Mainz

We present details on the manipulation of 40Ca+ ions in a segmented Paul trap with the purpose of realizing scalable quantum information experiments. On the one hand, fast shuttling of a trapped ion within 10 µs is required for the scalability of this approach, while near-perfect control over the ion motion has to be realized [1]. We present experimental results on such shuttling of laser-cooled ions on the timescale of the trap oscillation period, where vibrational excitations are minimized and the ion remains close to the ground state. The voltages appearing on the DC segments of the trap are generated by a custom-built FPGA-based digital arbitrary waveform generator, designed to provide 48 analog signals with update times as short as 400 ns. We furthermore give details for the combination of gate operations, shuttling operations and laser-cooling protocols, which will constitute the basic ingredients for future scalable quantum information experiments.

[1] G. Huber et al., Applied Physics B: Lasers and Optics, 100, 725-730 (2010).

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