Darmstadt 2008 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 8: Präzisionsmessungen und Metrologie II
Q 8.2: Vortrag
Montag, 10. März 2008, 16:45–17:00, 3D
Absolute frequency measurement of the 4s 2S1/2 ↔ 3d 2D5/2 clock transition of a single 40Ca+ in a Paul trap — •Michael Chwalla1, Kihwan Kim1, Gerhard Kirchmair2, Mark Riebe1, Thomas Monz1, Mark Riebe1, Philipp Schindler1, Alessandro Villar2, Christian F. Roos2, Wolfgang Hänsel1, Rainer Blatt1,2, Michel Abgrall3, Daniele Rovera3, and Philippe Laurent3 — 1Institut für Experimentalphysik, Universität Innsbruck, Techikerstr. 25, A-6020 Innsbruck — 2Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, Otto Hittmair-Platz 1, A-6020 Innsbruck — 3SYRTE, Observatoire de Paris, 61 Av. de l’Observatoire, 75014 Paris, France
We present an absolute frequency measurement of a single, trapped 40Ca+ ion at the 10−15 level, where a Cs referenced frequency comb is used to measure the frequency of the 4s 2S1/2 ↔ 3d 2D5/2 quadrupole transition at 411 042 129 776 396.2 ± 1.2 Hz. This is the most accurate measurement of Ca+ at present. A careful analysis of the estimated systematic shifts is given as well as an outlook on future improvements, which are required to possibly exceed the current precision of Cs-based frequency standards.