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Realizing a deterministic source of multipartite-entangled photonic qubits

Author

Listed:
  • Jean-Claude Besse

    (ETH Zurich)

  • Kevin Reuer

    (ETH Zurich)

  • Michele C. Collodo

    (ETH Zurich)

  • Arne Wulff

    (ETH Zurich)

  • Lucien Wernli

    (ETH Zurich)

  • Adrian Copetudo

    (ETH Zurich)

  • Daniel Malz

    (Max-Planck-Institute of Quantum Optics
    Munich Center for Quantum Science and Technology)

  • Paul Magnard

    (ETH Zurich)

  • Abdulkadir Akin

    (ETH Zurich)

  • Mihai Gabureac

    (ETH Zurich)

  • Graham J. Norris

    (ETH Zurich)

  • J. Ignacio Cirac

    (Max-Planck-Institute of Quantum Optics
    Munich Center for Quantum Science and Technology)

  • Andreas Wallraff

    (ETH Zurich
    ETH Zurich)

  • Christopher Eichler

    (ETH Zurich)

Abstract

Sources of entangled electromagnetic radiation are a cornerstone in quantum information processing and offer unique opportunities for the study of quantum many-body physics in a controlled experimental setting. Generation of multi-mode entangled states of radiation with a large entanglement length, that is neither probabilistic nor restricted to generate specific types of states, remains challenging. Here, we demonstrate the fully deterministic generation of purely photonic entangled states such as the cluster, GHZ, and W state by sequentially emitting microwave photons from a controlled auxiliary system into a waveguide. We tomographically reconstruct the entire quantum many-body state for up to N = 4 photonic modes and infer the quantum state for even larger N from process tomography. We estimate that localizable entanglement persists over a distance of approximately ten photonic qubits.

Suggested Citation

  • Jean-Claude Besse & Kevin Reuer & Michele C. Collodo & Arne Wulff & Lucien Wernli & Adrian Copetudo & Daniel Malz & Paul Magnard & Abdulkadir Akin & Mihai Gabureac & Graham J. Norris & J. Ignacio Cira, 2020. "Realizing a deterministic source of multipartite-entangled photonic qubits," Nature Communications, Nature, vol. 11(1), pages 1-6, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-18635-x
    DOI: 10.1038/s41467-020-18635-x
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