Hannover 2003 – wissenschaftliches Programm
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Q: Quantenoptik
Q 28: Poster: Quanteninformation
Q 28.10: Poster
Dienstag, 25. März 2003, 16:30–18:30, Lichthof
Towards Quantum Information Processing on Atom Chips — •P. Krüger1, S. Wildermuth1, M. Brajdic1, S. Groth1,2, I. Bar-Joseph2, R. Folman1, M. Andersson1, and J. Schmiedmayer1 — 1Physikalisches Institut, Universität Heidelberg, D-69120 Heidelberg — 2Weizmann Institute of Science, Rehovot, Israel
The concept of an atom chip, i.e. trapping, guiding, and manipulating cold neutral atoms in micropotentials created by small scale (µm) surface mounted structures, is investigated concerning its possible usage for scalable quantum information processing (QIP). Contemplated possibilities for the realization of qubits include internal (e.g. hyperfine states) and external (e.g. motional states in the trapping potential) degrees of freedom of the atom. Here, we present the status of experiments aiming at testing the feasibility of different qubit-implementations with the ultimate goal of demonstrating a fully operational 2-qubit gate. A newly set up apparatus was designed to facilitate the production of a Bose-Einstein condensate of 87Rb atoms which forms the starting point for the experiments. The influence of (conducting) surfaces on the qubit evolution constitutes an important concern that will be investigated by interferometric methods. Both theoretical predictions and experimental interferometer designs will be shown. We also present QIP-relevant experimental results obtained in a 7Li setup. This project is funded by the DFG and the EU (ACQUIRE collaboration).
[1] R.Folman et al., Adv.At.Mol.Phys. 48, 263 (2002).
[2] P.Krüger et al. submitted to Quantum Information Processing (T.Beth, G.Leuchs eds.).