Darmstadt 2008 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 6: Quanteninformation (Atome und Ionen II)
Q 6.2: Vortrag
Montag, 10. März 2008, 16:45–17:00, 1B
Experimental techniques for quantum information processing with trapped 43Ca+ ions — •Gerhard Kirchmair1,2, Jan Benhelm1,2, René Gerritsma1,2, Florian Zähringer1,2, Christian Roos1,2, and Rainer Blatt1,2 — 1Institut für Experimentalphysik, Universität Innsbruck, Österreich — 2Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Innsbruck, Österreich
We demonstrate the complete set of experimental techniques that are necessary to employ the isotope 43Ca+ for quantum information processing. Ground state cooling, robust state initialization and efficient read out are experimentally realized on a single 43Ca+ ion. With microwave transitions, we find the coherence time for storing quantum information in the hyperfine qubit (F=4,mF=0 ↔ F=3,mF=0) to be many seconds. Phase coherence during the interaction with a Raman laser is sustained for more than 200 ms. All techniques are also applicable to ion strings and the ability to move the ions makes individual addressing possible. We show that the motional coherence of a single ion is preserved during the shuttling process.