{
  "abstract": "Solid-state spin defects are a promising platform for quantum networks. A key requirement is to combine long ground-state spin-coherence times with a coherent optical transition for spin-photon entanglement. Here, we investigate the spin and optical coherence of single nitrogen-vacancy (NV) centres in (111)-grown isotopically engineered diamond. Our diamond-growth process yields a precisely controlled 13 C concentration and low-ppb nitrogen concentrations. Combined with the mitigation of 50 Hz noise using a real-time feedforward scheme and tailored decoupling sequences, this enables record defect-electron-spin coherence times of T 2 = 6.8(1) ms for a Hahn echo and of $${T}_{2}^{DD}=11.2(8)$$ T 2 D D = 11.2 ( 8 ) s under dynamical decoupling. In addition, we observe coherent optical transitions with a near-lifetime-limited homogeneous linewidth of 16.9(4) MHz (222(3) MHz inhomogeneous broadening under 515nm illumination) and characterize the spectral diffusion dynamics. These results provide new avenues to investigate the incorporation of impurities in diamond and new opportunities for improved spin-qubit control for quantum networks and other quantum technologies.",
  "abstract_shown": true,
  "affiliations": [
    "Kavli Institute of Nanoscience Delft, Delft University of Technology, Delft, The Netherlands",
    "QuTech, Delft University of Technology, Delft, The Netherlands",
    "Takasaki Institute for Advanced Quantum Science, National Institutes for Quantum Science and Technology (QST), Watanuki, Takasaki, Gunma, Japan",
    "Department of Materials Science Tohoku University, Aoba, Sendai, Miyagi, Japan",
    "Netherlands Organisation for Applied Scientific Research (TNO), Delft, The Netherlands"
  ],
  "article_type": null,
  "arxiv": null,
  "author_total": 10,
  "authors": [
    {
      "affs": [
        0,
        1
      ],
      "name": "T. Yamamoto",
      "orcid": "0009-0004-8038-4303"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Hendrik Benjamin van Ommen",
      "orcid": "0009-0004-1219-9413"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Kai-Niklas Schymik",
      "orcid": "0000-0003-4013-484X"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "Beer de Zoeten"
    },
    {
      "affs": [
        2
      ],
      "name": "Shinobu Onoda"
    },
    {
      "affs": [
        2
      ],
      "name": "Seiichi Saiki"
    },
    {
      "affs": [
        3,
        2
      ],
      "name": "Takeshi Ohshima",
      "orcid": "0000-0002-7850-3164"
    },
    {
      "affs": [
        4
      ],
      "name": "Hadi Arjmandi‐Tash",
      "orcid": "0000-0002-2800-8659"
    },
    {
      "affs": [
        4
      ],
      "name": "René Vollmer",
      "orcid": "0000-0001-9813-7248"
    },
    {
      "affs": [
        0,
        1
      ],
      "name": "T. H. Taminiau",
      "orcid": "0000-0002-2355-727X"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/8bphpgccn6z33.bib",
  "cited_by": 9,
  "doi": "10.1038/s41534-026-01368-y",
  "fulltext_url": null,
  "id": "8bphpgccn6z33",
  "issns": [
    "2056-6387"
  ],
  "landing_url": "https://doi.org/10.1038/s41534-026-01368-y",
  "language": "en",
  "licence": "CC-BY",
  "licence_label": "CC BY",
  "licence_source": "journal",
  "licence_url": "https://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": null,
  "native_subjects": [
    [
      "openalex",
      "2505|Diamond and Carbon-based Materials Research"
    ]
  ],
  "openalex": "W7153272921",
  "pdf_url": "https://www.nature.com/articles/s41534-026-01368-y_reference.pdf",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-28",
  "publisher": "Nature Portfolio",
  "ris": "https://research.draconitic.com/paper/8bphpgccn6z33.ris",
  "sources": [
    {
      "first_seen": "2026-11-07T13:21:06Z",
      "native_id": "W7153272921",
      "source": "openalex",
      "url": "https://doi.org/10.1038/s41534-026-01368-y"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "openalex:2505|Diamond and Carbon-based Materials Research",
      "subfield": "materials-polymers"
    }
  ],
  "title": "Ten-second electron-spin coherence in isotopically engineered diamond",
  "title_text": "Ten-second electron-spin coherence in isotopically engineered diamond",
  "type": "peer-reviewed",
  "updated_at": "2026-11-09T13:21:22Z",
  "url": "https://research.draconitic.com/paper/8bphpgccn6z33",
  "venue": "npj Quantum Information",
  "versions": []
}