Hannover 2016 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 27: Poster: Quantum Optics and Photonics II
Q 27.51: Poster
Tuesday, March 1, 2016, 16:30–19:00, Empore Lichthof
Progress Towards an Al+ Quantum Logic Optical Clock — •Johannes Kramer1, Nils Scharnhorst1, Stephan Hannig1, Ian D. Leroux1, and Piet O. Schmidt1,2 — 1Physikalisch-Technische Bundesanstalt, 38116 Braunschweig, Germany — 2Leibniz Universität Hannover, 30167 Hannover, Germany
We present the status of our aluminum ion optical clock, based on a single 27Al+ clock ion 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 the Coulomb interaction. 27Al+ provides a narrow (8 mHz) clock transition at 267 nm which exhibits negligible electric quadrupole shift and an exceptionally low sensitivity to black-body radiation. A measurement of the trap temperature combined with numerical simulations allows us to bound the black-body radiation shift to < 10−19 [1]. We use EIT cooling for fast ground-state cooling and we stabilize all relevant lasers via a so-called transfer-lock scheme [2] which transfers the short-term stability of a stable master laser to slave lasers of different wavelengths via a compact, reliable fiber frequency comb. We will present a characterization of time dilation shifts from residual secular and micromotion of the Al+ ion.
[1] M. Doležal et al., arXiv: 1510.05556 (2015).
[2] N. Scharnhorst et al., Opt. Express 23, 19771–19776 (2015).