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Experimental one-way quantum computing

Author

Listed:
  • P. Walther

    (University of Vienna)

  • K. J. Resch

    (University of Vienna)

  • T. Rudolph

    (Imperial College London)

  • E. Schenck

    (University of Vienna
    Ecole normale supérieure)

  • H. Weinfurter

    (Ludwig Maximilians University
    Max Planck Institute for Quantum Optics)

  • V. Vedral

    (University of Vienna
    The Erwin Schrödinger Institute for Mathematical Physics
    University of Leeds)

  • M. Aspelmeyer

    (University of Vienna)

  • A. Zeilinger

    (University of Vienna
    IQOQI, Institute for Quantum Optics and Quantum Information, Austrian Academy of Sciences)

Abstract

Standard quantum computation is based on sequences of unitary quantum logic gates that process qubits. The one-way quantum computer proposed by Raussendorf and Briegel is entirely different. It has changed our understanding of the requirements for quantum computation and more generally how we think about quantum physics. This new model requires qubits to be initialized in a highly entangled cluster state. From this point, the quantum computation proceeds by a sequence of single-qubit measurements with classical feedforward of their outcomes. Because of the essential role of measurement, a one-way quantum computer is irreversible. In the one-way quantum computer, the order and choices of measurements determine the algorithm computed. We have experimentally realized four-qubit cluster states encoded into the polarization state of four photons. We characterize the quantum state fully by implementing experimental four-qubit quantum state tomography. Using this cluster state, we demonstrate the feasibility of one-way quantum computing through a universal set of one- and two-qubit operations. Finally, our implementation of Grover's search algorithm demonstrates that one-way quantum computation is ideally suited for such tasks.

Suggested Citation

  • P. Walther & K. J. Resch & T. Rudolph & E. Schenck & H. Weinfurter & V. Vedral & M. Aspelmeyer & A. Zeilinger, 2005. "Experimental one-way quantum computing," Nature, Nature, vol. 434(7030), pages 169-176, March.
  • Handle: RePEc:nat:nature:v:434:y:2005:i:7030:d:10.1038_nature03347
    DOI: 10.1038/nature03347
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    Cited by:

    1. Kui An & Zilei Liu & Ting Zhang & Siqi Li & You Zhou & Xiao Yuan & Leiran Wang & Wenfu Zhang & Guoxi Wang & He Lu, 2024. "Efficient characterizations of multiphoton states with an ultra-thin optical device," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    2. Ferenc Iglói & Csaba Zoltán Király, 2024. "Entanglement detection in postquench nonequilibrium states: thermal Gibbs vs. generalized Gibbs ensemble," The European Physical Journal B: Condensed Matter and Complex Systems, Springer;EDP Sciences, vol. 97(6), pages 1-12, June.
    3. Shuai Shi & Biao Xu & Kuan Zhang & Gen-Sheng Ye & De-Sheng Xiang & Yubao Liu & Jingzhi Wang & Daiqin Su & Lin Li, 2022. "High-fidelity photonic quantum logic gate based on near-optimal Rydberg single-photon source," Nature Communications, Nature, vol. 13(1), pages 1-6, December.
    4. Kunze Lu & Manlin Luo & Weibo Gao & Qi Jie Wang & Hao Sun & Donguk Nam, 2023. "Strong second-harmonic generation by sublattice polarization in non-uniformly strained monolayer graphene," Nature Communications, Nature, vol. 14(1), pages 1-8, December.
    5. Nadia O. Antoniadis & Mark R. Hogg & Willy F. Stehl & Alisa Javadi & Natasha Tomm & Rüdiger Schott & Sascha R. Valentin & Andreas D. Wieck & Arne Ludwig & Richard J. Warburton, 2023. "Cavity-enhanced single-shot readout of a quantum dot spin within 3 nanoseconds," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    6. Michael Hollenbach & Nico Klingner & Nagesh S. Jagtap & Lothar Bischoff & Ciarán Fowley & Ulrich Kentsch & Gregor Hlawacek & Artur Erbe & Nikolay V. Abrosimov & Manfred Helm & Yonder Berencén & Georgy, 2022. "Wafer-scale nanofabrication of telecom single-photon emitters in silicon," Nature Communications, Nature, vol. 13(1), pages 1-7, December.
    7. 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).
    8. Yijian Meng & Ming Lai Chan & Rasmus B. Nielsen & Martin H. Appel & Zhe Liu & Ying Wang & Nikolai Bart & Andreas D. Wieck & Arne Ludwig & Leonardo Midolo & Alexey Tiranov & Anders S. Sørensen & Peter , 2024. "Deterministic photon source of genuine three-qubit entanglement," Nature Communications, Nature, vol. 15(1), pages 1-7, December.

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