Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 15: Poster: Quantum Optics and Photonics I
Q 15.63: Poster
Monday, March 23, 2015, 17:00–19:00, C/Foyer
Progress Report Towards an Al+ Quantum Logic Optical Clock — •Stephan Hannig1, Nils Scharnhorst1, Jannes B. Wübbena1, Kornelius Jakobsen1, 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.
We show a setup to transfer the stability of an ultra-stable reference laser to the 729 nm Ca+ logic laser. Additionally, the status of the experiment and recent results including double EIT cooling are presented.
Recently, a second generation, new vacuum chamber has been set up. The new system is designed to include a segmented multi-layer linear Paul trap. It paves the way towards multi-ion clocks, combining the high accuracy of single-ion clocks with high stability.