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Q: Fachverband Quantenoptik und Photonik

Q 56: Poster IV

Q 56.46: Poster

Thursday, March 5, 2009, 16:30–19:00, VMP 9 Poster

Towards Cryogenic Surface Ion Traps — •Michael Niedermayr¹, Muir Kumph¹, Birgit Brandstätter¹, Piet O. Schmidt¹, and Rainer Blatt^{1, 2} — ¹Institut für Experimentalphysik, Universität Innsbruck, Technikerstrasse 25, 6020 Innsbruck, Austria — ²Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Otto-Hittmair-Platz 1, 6020 Innsbruck, Austria

A promising approach for scalable quantum information processing (QIP) architectures is based on miniaturized surface ion traps. These traps with dimensions in the sub-100 µm range can be fabricated by photolithography techniques. Experimental results indicate that the motional heating rate of the ions in the trap increases with decreasing trap dimensions to the fourth power. The mechanism of this anomalous heating is not yet fully understood. However, it can be reduced by several orders of magnitude when the trap electrodes are cooled from room temperature to 4 K. We are currently setting up a new experiment in which we intend to investigate surface traps in a cryogenic environment. These self-made traps will be employed to study quantum simulations, fundamentals of large-scale entanglement and cavity-QED systems with integrated micro-optics.