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Trapped-ion antennae for the transmission of quantum information

Author

Listed:
  • M. Harlander

    (Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25)

  • R. Lechner

    (Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25)

  • M. Brownnutt

    (Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25)

  • R. Blatt

    (Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25
    Institut für Quantenoptik und Quanteninformation der Österreichischen Akademie der Wissenschaften, Technikerstraße 21a)

  • W. Hänsel

    (Institut für Experimentalphysik, Universität Innsbruck, Technikerstraße 25
    Institut für Quantenoptik und Quanteninformation der Österreichischen Akademie der Wissenschaften, Technikerstraße 21a
    Present address: Menlo Systems GmbH, Am Klopferspitz 19a, D-82152, Martinsried, Germany.)

Abstract

Linkage at the quantum level The harmonic oscillator is a simple and ubiquitous physical system, and various oscillators functioning at the quantum mechanical level are known. Previously, linkage between two quantum mechanical oscillators has been achieved only indirectly, but two groups now demonstrate direct coupling at the quantum level between two harmonic oscillators in separate locations. Such systems could be used as the building blocks for quantum information processors and simulators. Brown et al. achieve direct controllable coupling between 9Be+ ions held 40 micrometres apart in trapping potentials. In a similar experiment, Harlander et al. couple single 40Ca+ ions trapped 54 μm apart. In their system, additional ions act as antennae to amplify the coupling.

Suggested Citation

  • M. Harlander & R. Lechner & M. Brownnutt & R. Blatt & W. Hänsel, 2011. "Trapped-ion antennae for the transmission of quantum information," Nature, Nature, vol. 471(7337), pages 200-203, March.
    • Handle: RePEc:nat:nature:v:471:y:2011:i:7337:d:10.1038_nature09800
    DOI: 10.1038/nature09800
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