Berlin 2014 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 16: Poster: Quantum information, micromechanical oscillators, matter wave optics, precision measurements and metrology
Q 16.71: Poster
Montag, 17. März 2014, 16:30–18:30, Spree-Palais
Progress Report Towards an Al+ Quantum Logic Optical Clock — •Stephan Hannig1, Sana Amairi1, Jannes B. Wübbena1, Nils Scharnhorst1, Ian D. Leroux1, and Piet O. Schmidt1, 2 — 1QUEST Institute for Experimental Quantum Metrology, PTB, 38116 Braunschweig, Germany — 2LUH, 30167 Hannover, Germany
We present the status of our aluminium ion optical clock using quantum logic techniques for cooling and reading out the clock ion. The design goals for the frequency standard are an inaccuracy below 10−17 and relative instability better than 10−15 in one second. 27Al+ provides a narrow (8 mHz) clock transition at 267 nm which exhibits no electric quadrupole shift and a low sensitivity to black-body radiation. A single 27Al+ ion will be confined in a linear Paul Trap together with a 40Ca+ logic ion. The latter is used for sympathetic cooling and internal state detection of the clock ion via Coulomb interaction.
The high stability will be achieved through a 39.5 cm long clock cavity with reduced thermal noise. Preliminary results on the thermal characteristics and the sensitivity to vibrations will be presented. Moreover, we show a setup to quadruple the output frequency of the clock laser locked to the cavity. We present the status of the experiment and recent results. Currently, a second generation, new vacuum chamber including a segmented multi-layer linear paul trap is designed. The new system paves the way towards multi-ion clocks, combining the high accuracy of single-ion clocks with high stability.