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A quantum processor based on coherent transport of entangled atom arrays

Author

Listed:
  • Dolev Bluvstein

    (Harvard University)

  • Harry Levine

    (Harvard University
    AWS Center for Quantum Computing)

  • Giulia Semeghini

    (Harvard University)

  • Tout T. Wang

    (Harvard University)

  • Sepehr Ebadi

    (Harvard University)

  • Marcin Kalinowski

    (Harvard University)

  • Alexander Keesling

    (Harvard University
    QuEra Computing Inc.)

  • Nishad Maskara

    (Harvard University)

  • Hannes Pichler

    (University of Innsbruck
    Austrian Academy of Sciences)

  • Markus Greiner

    (Harvard University)

  • Vladan Vuletić

    (Massachusetts Institute of Technology)

  • Mikhail D. Lukin

    (Harvard University)

Abstract

The ability to engineer parallel, programmable operations between desired qubits within a quantum processor is key for building scalable quantum information systems1,2. In most state-of-the-art approaches, qubits interact locally, constrained by the connectivity associated with their fixed spatial layout. Here we demonstrate a quantum processor with dynamic, non-local connectivity, in which entangled qubits are coherently transported in a highly parallel manner across two spatial dimensions, between layers of single- and two-qubit operations. Our approach makes use of neutral atom arrays trapped and transported by optical tweezers; hyperfine states are used for robust quantum information storage, and excitation into Rydberg states is used for entanglement generation3–5. We use this architecture to realize programmable generation of entangled graph states, such as cluster states and a seven-qubit Steane code state6,7. Furthermore, we shuttle entangled ancilla arrays to realize a surface code state with thirteen data and six ancillary qubits8 and a toric code state on a torus with sixteen data and eight ancillary qubits9. Finally, we use this architecture to realize a hybrid analogue–digital evolution2 and use it for measuring entanglement entropy in quantum simulations10–12, experimentally observing non-monotonic entanglement dynamics associated with quantum many-body scars13,14. Realizing a long-standing goal, these results provide a route towards scalable quantum processing and enable applications ranging from simulation to metrology.

Suggested Citation

  • Dolev Bluvstein & Harry Levine & Giulia Semeghini & Tout T. Wang & Sepehr Ebadi & Marcin Kalinowski & Alexander Keesling & Nishad Maskara & Hannes Pichler & Markus Greiner & Vladan Vuletić & Mikhail D, 2022. "A quantum processor based on coherent transport of entangled atom arrays," Nature, Nature, vol. 604(7906), pages 451-456, April.
  • Handle: RePEc:nat:nature:v:604:y:2022:i:7906:d:10.1038_s41586-022-04592-6
    DOI: 10.1038/s41586-022-04592-6
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    Citations

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    Cited by:

    1. Wenhui Xu & Chenwei Lv & Qi Zhou, 2024. "Multipolar condensates and multipolar Josephson effects," Nature Communications, Nature, vol. 15(1), pages 1-12, December.
    2. Shankar G. Menon & Noah Glachman & Matteo Pompili & Alan Dibos & Hannes Bernien, 2024. "An integrated atom array-nanophotonic chip platform with background-free imaging," Nature Communications, Nature, vol. 15(1), pages 1-7, December.
    3. Ziqian Li & Tanay Roy & David Rodríguez Pérez & Kan-Heng Lee & Eliot Kapit & David I. Schuster, 2024. "Autonomous error correction of a single logical qubit using two transmons," Nature Communications, Nature, vol. 15(1), pages 1-6, December.
    4. Gyungmin Cho & Dohun Kim, 2024. "Machine learning on quantum experimental data toward solving quantum many-body problems," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    5. Dylan Harley & Ishaun Datta & Frederik Ravn Klausen & Andreas Bluhm & Daniel Stilck França & Albert H. Werner & Matthias Christandl, 2024. "Going beyond gadgets: the importance of scalability for analogue quantum simulators," Nature Communications, Nature, vol. 15(1), pages 1-16, December.
    6. Luheng Zhao & Michael Dao Kang Lee & Mohammad Mujahid Aliyu & Huanqian Loh, 2023. "Floquet-tailored Rydberg interactions," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    7. Yue Wu & Shimon Kolkowitz & Shruti Puri & Jeff D. Thompson, 2022. "Erasure conversion for fault-tolerant quantum computing in alkaline earth Rydberg atom arrays," Nature Communications, Nature, vol. 13(1), pages 1-7, December.

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