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Microsecond-lived quantum states in a carbon-based circuit driven by cavity photons

Author

Listed:
  • B. Neukelmance

    (Université Paris Cité
    C12 Quantum Electronics)

  • B. Hue

    (Université Paris Cité
    C12 Quantum Electronics)

  • Q. Schaeverbeke

    (C12 Quantum Electronics)

  • L. Jarjat

    (Université Paris Cité)

  • A. Théry

    (Université Paris Cité)

  • J. Craquelin

    (Université Paris Cité)

  • W. Legrand

    (Université Paris Cité
    C12 Quantum Electronics)

  • T. Cubaynes

    (Université Paris Cité)

  • G. Abulizi

    (C12 Quantum Electronics)

  • J. Becdelievre

    (C12 Quantum Electronics)

  • M. El Abbassi

    (C12 Quantum Electronics)

  • A. Larrouy

    (C12 Quantum Electronics)

  • K. F. Ourak

    (C12 Quantum Electronics)

  • D. Stefani

    (C12 Quantum Electronics)

  • J. A. Sulpizio

    (C12 Quantum Electronics)

  • A. Cottet

    (Université Paris Cité
    Sorbonne Université)

  • M. M. Desjardins

    (C12 Quantum Electronics)

  • T. Kontos

    (Université Paris Cité
    Sorbonne Université)

  • M. R. Delbecq

    (Université Paris Cité
    Sorbonne Université
    Institut universitaire de France (IUF))

Abstract

Semiconductor quantum dots are an attractive platform for the realisation of quantum processors. To achieve long-range coupling between them, quantum dots have been integrated into microwave cavities. However, it has been shown that their coherence is then reduced compared to their cavity-free implementations. Here, we manipulate the quantum states of a suspended carbon nanotube double quantum dot with ferromagnetic contacts embedded in a microwave cavity. By performing quantum manipulations via the cavity photons, we demonstrate coherence times of the order of 1.3 μs, two orders of magnitude larger than those measured so far in any carbon quantum circuit and one order of magnitude larger than silicon-based quantum dots in comparable environment. This holds promise for carbon as a host material for spin qubits in circuit quantum electrodynamics.

Suggested Citation

  • B. Neukelmance & B. Hue & Q. Schaeverbeke & L. Jarjat & A. Théry & J. Craquelin & W. Legrand & T. Cubaynes & G. Abulizi & J. Becdelievre & M. El Abbassi & A. Larrouy & K. F. Ourak & D. Stefani & J. A., 2025. "Microsecond-lived quantum states in a carbon-based circuit driven by cavity photons," Nature Communications, Nature, vol. 16(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-60952-6
    DOI: 10.1038/s41467-025-60952-6
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