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Preparation and measurement of three-qubit entanglement in a superconducting circuit

Author

Listed:
  • L. DiCarlo

    (Yale University)

  • M. D. Reed

    (Yale University)

  • L. Sun

    (Yale University)

  • B. R. Johnson

    (Yale University)

  • J. M. Chow

    (Yale University)

  • J. M. Gambetta

    (University of Waterloo)

  • L. Frunzio

    (Yale University)

  • S. M. Girvin

    (Yale University)

  • M. H. Devoret

    (Yale University)

  • R. J. Schoelkopf

    (Yale University)

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

  • L. DiCarlo & M. D. Reed & L. Sun & B. R. Johnson & J. M. Chow & J. M. Gambetta & L. Frunzio & S. M. Girvin & M. H. Devoret & R. J. Schoelkopf, 2010. "Preparation and measurement of three-qubit entanglement in a superconducting circuit," Nature, Nature, vol. 467(7315), pages 574-578, September.
    • Handle: RePEc:nat:nature:v:467:y:2010:i:7315:d:10.1038_nature09416
    DOI: 10.1038/nature09416
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