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Quantum computing implementations with neutral particles

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Abstract

We review quantum information processing with cold neutral particles, that is, atoms or polar molecules. First, we analyze the best suited degrees of freedom of these particles for storing quantum information, and then we discuss both single- and two-qubit gate implementations. We focus our discussion mainly on collisional quantum gates, which are best suited for atom-chip-like devices, as well as on gate proposals conceived for optical lattices. Additionally, we analyze schemes both for cold atoms confined in optical cavities and hybrid approaches to entanglement generation, and we show how optimal control theory might be a powerful tool to enhance the speed up of the gate operations as well as to achieve high fidelities required for fault tolerant quantum computation.

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Authors and Affiliations

  1. Institute for Quantum Information Processing, University of Ulm, Albert-Einstein-Allee 11, 89069, Ulm, Germany

    Antonio Negretti & Tommaso Calarco

  2. Lundbeck Foundation Theoretical Center for Quantum System Research, Department of Physics and Astronomy, University of Aarhus, 8000, Aarhus C, Denmark

    Antonio Negretti

  3. Departement Physik, Universität Basel, Klingelbergstrasse 82, 4056, Basel, Switzerland

    Philipp Treutlein

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Negretti, A., Treutlein, P. & Calarco, T. Quantum computing implementations with neutral particles. Quantum Inf Process 10, 721 (2011). https://doi.org/10.1007/s11128-011-0291-5

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