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Generation of three-qubit entangled states using superconducting phase qubits

Author

Listed:
  • Matthew Neeley

    (University of California)

  • Radoslaw C. Bialczak

    (University of California)

  • M. Lenander

    (University of California)

  • E. Lucero

    (University of California)

  • Matteo Mariantoni

    (University of California)

  • A. D. O’Connell

    (University of California)

  • D. Sank

    (University of California)

  • H. Wang

    (University of California)

  • M. Weides

    (University of California)

  • J. Wenner

    (University of California)

  • Y. Yin

    (University of California)

  • T. Yamamoto

    (University of California
    Green Innovation Research Laboratories, NEC Corporation)

  • A. N. Cleland

    (University of California)

  • John M. Martinis

    (University of California)

Abstract

Three-qubit solid-state entanglement realized Quantum entanglement, in which the states of two or more particles are inextricably linked, is a key requirement for quantum computation. In superconducting devices, two-qubit entangled states have been used to implement simple quantum algorithms. The availability of three-qubit states, which can be entangled in two fundamentally different ways (the GHZ and W states), would be a significant advance because they should make it possible to perform error correction and infer scalability to the higher numbers of qubits needed for a practical quantum-information-processing device. Two groups now report the generation of three-qubit entanglement. John Martinis and colleagues create and measure both GHZ and W-type states. Leonardo DiCarlo and colleagues generate the GHZ state and demonstrate the first step of basic quantum error correction by encoding a logical qubit into a manifold of GHZ-like states using a repetition code.

Suggested Citation

  • Matthew Neeley & Radoslaw C. Bialczak & M. Lenander & E. Lucero & Matteo Mariantoni & A. D. O’Connell & D. Sank & H. Wang & M. Weides & J. Wenner & Y. Yin & T. Yamamoto & A. N. Cleland & John M. Marti, 2010. "Generation of three-qubit entangled states using superconducting phase qubits," Nature, Nature, vol. 467(7315), pages 570-573, September.
    • Handle: RePEc:nat:nature:v:467:y:2010:i:7315:d:10.1038_nature09418
    DOI: 10.1038/nature09418
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