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Deterministic quantum teleportation with atoms

Author

Listed:
  • M. Riebe

    (Universität Innsbruck)

  • H. Häffner

    (Universität Innsbruck)

  • C. F. Roos

    (Universität Innsbruck)

  • W. Hänsel

    (Universität Innsbruck)

  • J. Benhelm

    (Universität Innsbruck)

  • G. P. T. Lancaster

    (Universität Innsbruck)

  • T. W. Körber

    (Universität Innsbruck)

  • C. Becher

    (Universität Innsbruck)

  • F. Schmidt-Kaler

    (Universität Innsbruck)

  • D. F. V. James

    (Los Alamos National Laboratory)

  • R. Blatt

    (Universität Innsbruck
    Österreichische Akademie der Wissenschaften)

Abstract

Teleportation of a quantum state encompasses the complete transfer of information from one particle to another. The complete specification of the quantum state of a system generally requires an infinite amount of information, even for simple two-level systems (qubits). Moreover, the principles of quantum mechanics dictate that any measurement on a system immediately alters its state, while yielding at most one bit of information. The transfer of a state from one system to another (by performing measurements on the first and operations on the second) might therefore appear impossible. However, it has been shown1 that the entangling properties of quantum mechanics, in combination with classical communication, allow quantum-state teleportation to be performed. Teleportation using pairs of entangled photons has been demonstrated2,3,4,5,6, but such techniques are probabilistic, requiring post-selection of measured photons. Here, we report deterministic quantum-state teleportation between a pair of trapped calcium ions. Following closely the original proposal1, we create a highly entangled pair of ions and perform a complete Bell-state measurement involving one ion from this pair and a third source ion. State reconstruction conditioned on this measurement is then performed on the other half of the entangled pair. The measured fidelity is 75%, demonstrating unequivocally the quantum nature of the process.

Suggested Citation

  • M. Riebe & H. Häffner & C. F. Roos & W. Hänsel & J. Benhelm & G. P. T. Lancaster & T. W. Körber & C. Becher & F. Schmidt-Kaler & D. F. V. James & R. Blatt, 2004. "Deterministic quantum teleportation with atoms," Nature, Nature, vol. 429(6993), pages 734-737, June.
  • Handle: RePEc:nat:nature:v:429:y:2004:i:6993:d:10.1038_nature02570
    DOI: 10.1038/nature02570
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    Cited by:

    1. Jie Zhao & Hao Jeng & Lorcán O. Conlon & Spyros Tserkis & Biveen Shajilal & Kui Liu & Timothy C. Ralph & Syed M. Assad & Ping Koy Lam, 2023. "Enhancing quantum teleportation efficacy with noiseless linear amplification," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    2. Sainath Motlakunta & Nikhil Kotibhaskar & Chung-You Shih & Anthony Vogliano & Darian McLaren & Lewis Hahn & Jingwen Zhu & Roland Hablützel & Rajibul Islam, 2024. "Preserving a qubit during state-destroying operations on an adjacent qubit at a few micrometers distance," Nature Communications, Nature, vol. 15(1), pages 1-8, December.
    3. Feng, Changchun & Chen, Lin & Zhao, Li-Jun, 2023. "Coherence and entanglement in Grover and Harrow–Hassidim–Lloyd algorithm," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 626(C).

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