Dresden 2011 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 23: Poster 2: Intersectional Session

Q 23.32: Poster

Tuesday, March 15, 2011, 18:00–21:00, P1

State manipulation of single atoms in a high-finesse optical cavity — •Manuel Uphoff, Christian Nölleke, Andreas Reiserer, Holger Specht, Eden Figueroa, Stephan Ritter, and Gerhard Rempe — Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748 Garching

Single atoms trapped in a high-finesse optical cavity are an ideal candidate for the distribution of quantum information over a quantum network. Coherent manipulation of the atomic state allows single qubit rotations on the atom and the mapping of qubits to decoherence-free subspaces. Efficient state transfer by microwave radiation is prohibited in our atom-cavity system as the cavity assembly largely shields the long-wavelength radiation. Therefore stimulated Raman transitions with their sub-natural linewidth are best suited to drive transitions between hyper-fine states of atoms trapped in a high-finesse cavity. We report on near unity transfer of the population using π-pulses in 1 µs, which is much shorter than the lifetime of the atomic state. The effects of the geometry and polarisation of the Raman beams and their interplay with different Zeeman substates are investigated and future applications in detecting and manipulating the motional state of the atom will be discussed.