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Q: Fachverband Quantenoptik und Photonik

Q 23: Poster 2: Intersectional Session

Q 23.30: Poster

Dienstag, 15. März 2011, 18:00–21:00, P1

Spin-Spin interaction in impurity doped ion crystal — •Peter Ivanov, Amado Bautista-Salvador, Jens Welzel, Niels Kurz, Frank Ziesel, Max Hettrich, Ulrich Poschinger, and Ferdinand Schmidt-Kaler — Institut für Physik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany

For the simulation of magnetic quantum phase transitions, we consider the behavior of the effective spin-spin couplings in an ion crystal of ⁴⁰Ca⁺ S = 1/2 ions doped with high magnetic moment ions, such as Mn⁺, which possess spin S = 3 in the electronic-ground state. Spin-spin interactions are tailored by employing an oscillating magnetic field with a strong gradient. The presence of ion species with S > 1/2 increases the strength of the effective spin-spin interaction which allows for observation of Schrodinger cat states of large size. Moreover, we discuss how the impurity doped ion crystal is suited for the investigation of quantum phase transitions and frustration effects in spin systems. First experimental steps in a specialized planar ion trap have been realized. We will report about the experimental and theoretical progress