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Q: Fachverband Quantenoptik und Photonik

Q 16: Poster: Quantum information, micromechanical oscillators, matter wave optics, precision measurements and metrology

Q 16.46: Poster

Montag, 17. März 2014, 16:30–18:30, Spree-Palais

Cryogenic ion-trap system for quantum computing applications. — •Kirill Lakhmanskiy¹, Michael Niedermayr¹, Stefan Partel³, Alexander Erhard¹, Johannes Edlinger³, Michael Brownnutt¹, and Rainer Blatt^{1, 2} — ¹Institut für Experimentalphysik, Universität Innsbruck, 6020 Innsbruck, Austria — ²Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Otto-Hittmair-Platz 1, A-6020 Innsbruck, Austria — ³FH Vorarlberg, Forschungszentrum Mikrotechnik, Hochschulstraße 1, 6850 Dornbirn, Austria

Trapped ions have demonstrated great promise for investigating and controlling quantum systems. Operating traps under cryogenic conditions provides a number of distinct benefits. These include reducing the rate at which the ion is heated (thereby increasing the coherence time of the motional state); allowing the use of new materials and components which would otherwise be unsuitable for use in vacuum; and facilitating a faster development cycle for testing different experimental configurations.

We report on the fabrication and operation of a cryogenic trapped-ion system which leverages each of these benefits. Surface ion traps which exhibit low and highly reproducible heating rates have been fabricated. Driving and filtering electronics are mounted on the 4 K stage of the cryostat, in close proximity to the trap and in ultra-high vacuum. This system has been used in conjunction with stabilised diode-laser systems to trap, cool and manipulate single ⁴⁰Ca⁺ ions.