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Extending coherence in a diode-embedded quantum register

ORAL

Abstract

Solid-state spin defects in silicon carbide (SiC) demonstrate a near-infrared spin-photon interface [1], long coherence times [2], and a mature material platform with wafer-scale commercial compatibility. Specifically, recent results have demonstrated single-shot readout and extended dephasing and decoherence times [3] with isolated, single neutral divacancy (VV0) defects in isotopically-engineered SiC. Here, we demonstrate record dephasing and Hahn-echo times of proximal nuclear spin qubits by mitigating dominant noise sources, highlighting the benefits of isotopic growth and device integration [4]. Such nuclear spins could provide robust quantum registers to the optically-active electron spin qubit. Finally, we also demonstrate narrowed optical lines of VV0 at the lifetime limit in this same device. Our results enable new pathways for highly coherent qubits for quantum information processing and sensing by mitigating both electronic and magnetic noise.

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Publication: [1] D. J. Christle et al., Phys. Rev. X. 7, 1-12 (2017).<br>[2] H. Seo et al., Nat. Comm. 7, 12935 (2016). <br>[3] C. P. Anderson, E. O. Glen et al., Sci. Adv. 8, 5, eabm5912 (2022).<br>[4] C. Zeledon et al., in preparation (2025).

Presenters

  • Cyrus Zeledon

    University of Chicago

Authors

  • Cyrus Zeledon

    University of Chicago

  • Benjamin Pingault

    University of Chicago, Argonne National Laboratory & University of Chicago

  • Jonathan C Marcks

    Argonne National Laboratory

  • Yeghishe Tsaturyan

    University of Chicago, Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA., Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA

  • Mykyta Onizhuk

    University of Chicago

  • Benjamin S Soloway

    University of Chicago, Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA., Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA

  • Hiroshi Abe

    National Institutes for Quantum and Radiological Science and Technology, National Institutes for Quantum Science and Technology (QST), National Institutes for Quantum Science and Technology (Japan), National Institutes for Quantum Science and Technology,

  • Jawad Ul-Hassan

    Linköping University, Linkoping University, LIU, Link¨oping University

  • Takeshi Ohshima

    National Institutes for Quantum Science and Technology (Japan), National Institutes for Quantum Science and Technology (QST)

  • Tien Son Nguyen

    Linkoping University

  • F. Joseph Heremans

    Argonne Nantional Lab, Materials Science Division and X-ray Science Division, Argonne National Laboratory, Argonne National Laboratory, Argonne National Lab, University of Chicago

  • Giulia Galli

    University of Chicago

  • Christopher P Anderson

    University of Illinois Urbana-Champaign, University of Illinois at Urbana-Champaign

  • David D Awschalom

    University of Chicago, Pritzker School of Molecular Engineering and Department of Physics, University of Chicago, Chicago, IL, USA, Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA., Pritzker School of Molecular Engineering, University of Chicago, Chicago, IL 60637, USA, Argonne National Laboratory