Stuttgart 2012 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 47: Quanteninformation: Atome und Ionen 2

Q 47.7: Talk

Thursday, March 15, 2012, 15:30–15:45, V7.02

RF optical double resonance spectroscopy on ¹⁷²Yb⁺ in a segmented micro-structured ion trap — •Michael Johanning, M. Tanveer Baig, Thomas Collath, Timm F. Gloger, Delia Kaufmann, Peter Kaufmann, and Christof Wunderlich — Universität Siegen, NT Fakultät, Department Physik, 57068 Siegen, Germany

We apply rf-optical double resonance spectroscopy to laser cooled ions, stored in a micro-structured segmented trap with integrated magnetic field coils. Such a setup is a very flexible starting point for quantum information science experiments, as it allows for coherent processing of quantum information, and for the generation of tailored interaction Hamiltonians to simulate various physical systems. A ¹⁷²Yb⁺-ion is optically pumped into a dark Zeeman state of the D_3/2-manifold, and fluorescence is recovered, when a resonant rf field bridges the energy gap between the Zeeman sublevels and the ion is optical pumped back into the S_1/2-state via the [3/2]_1/2-state by light near 935 nm. Thus the resonance frequency is a sensitive measure of the magnetic field and can be used to precisely map the spatial magnetic field dependence along the trap axis. An intentional magnetic gradient lifts the degenercy of the rf resonance in a string of ions and is applied to address single ions in frequency space.