{
  "abstract": "Robust entanglement at room temperature is a central challenge for solid-state quantum information processing and quantum-enhanced sensing. Here we demonstrate room-temperature storage of entanglement in a silicon carbide (SiC) quantum node by coherently transferring an electron-nuclear entangled state onto long-lived nuclear-spin memory qubits. Using a shallow single color center in 4H-SiC, conventionally denoted PL6, we realize a fully addressable three-qubit register composed of one electron-spin processor and two strongly coupled $^{29}$Si nuclear-spin memory qubits. This platform enables the deterministic generation of high-fidelity entangled states, including a nuclear-spin Bell state with a fidelity of $94 \\pm 2\\%$ and a three-qubit Greenberger-Horne-Zeilinger (GHZ)-type state with a fidelity of $89 \\pm 4\\%$. By implementing a SWAP-gate protocol in the strong hyperfine-coupling regime, the electron-nuclear entanglement is transferred to the nuclear-spin memory with a fidelity of $92.5 \\pm 2.5\\%$, extending the entanglement lifetime by a factor of 240. We further confirm the generality of this approach in an additional heterogeneous $^{29}$Si-$^{13}$C nuclear-spin register and, through a statistical survey of 200 single PL6 centers, show that multi-nuclear-spin registers occur naturally with probabilities above 10%. These results position shallow SiC color centers as a powerful platform for entanglement-assisted quantum sensing and scalable room-temperature quantum technologies.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": "Journal reference: Phys. Rev. Lett. 137, 100803 (2026)",
  "arxiv": "2609.13744",
  "author_total": 11,
  "authors": [
    {
      "name": "Shuo Ren"
    },
    {
      "name": "Rui-Jian Liang"
    },
    {
      "name": "Qi-Cheng Hu"
    },
    {
      "name": "Zhen-Xuan He"
    },
    {
      "name": "Ji-Yang Zhou"
    },
    {
      "name": "Wu-Xi Lin"
    },
    {
      "name": "Zhi-He Hao"
    },
    {
      "name": "Tao Tu"
    },
    {
      "name": "Jin-Shi Xu"
    },
    {
      "name": "Chuan-Feng Li"
    },
    {
      "name": "Guang-Can Guo"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/65r4mht2b4mhb.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.13744",
  "fulltext_url": null,
  "id": "65r4mht2b4mhb",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.13744",
  "language": null,
  "licence": "LicenseRef-arXiv-nonexclusive-1.0",
  "licence_label": "arXiv licence",
  "licence_source": "article",
  "licence_url": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2609.13744",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-12",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/65r4mht2b4mhb.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2609.13744",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.13744"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Room-Temperature Storage of Entanglement in a Silicon Carbide Quantum Node",
  "title_text": "Room-Temperature Storage of Entanglement in a Silicon Carbide Quantum Node",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/65r4mht2b4mhb",
  "venue": "arXiv",
  "versions": [
    {
      "doi": "10.1103/454t-n78h",
      "pid": null,
      "relation": "published-as",
      "title": null,
      "venue": null
    }
  ]
}