{
  "abstract": "Scalable quantum networks require generating remote entanglement faster than decoherence erases it, calling for nodes that combine efficient light-matter interfaces with long coherence times. Cavity-coupled trapped ions are a promising platform for network nodes, offering high-efficiency extraction of photons. Here, we report multi-second coherence for a qubit register in a cavity-integrated ion trap. First, using dynamical decoupling on spin ground states, the coherence times of five co-trapped ion qubits are extended into the multi-second regime. Second, cavity-collected ion-photon entanglement is faithfully stored in these protected ion-memory states for multiple seconds. Third, we show that ion-memory qubits can be robust to the generation of over a thousand cavity photons by a co-trapped ion, with decoherence limited by laser crosstalk. Finally, we estimate that a modestly improved and duplicated ion-cavity system could enable the simultaneous establishment of multiple remote Bell pairs between two remote ion registers, representing a step toward networking multi-qubit prototype trapped-ion quantum processors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.22030",
  "author_total": 5,
  "authors": [
    {
      "name": "James Bate"
    },
    {
      "name": "Johannes Helgert"
    },
    {
      "name": "Marco Canteri"
    },
    {
      "name": "Victor Krutyanskiy"
    },
    {
      "name": "Benjamin Peter Lanyon"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/0rczpybmk1n78.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.22030",
  "fulltext_url": null,
  "id": "0rczpybmk1n78",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.22030",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7204156769",
  "pdf_url": "https://arxiv.org/pdf/2608.22030",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-13",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/0rczpybmk1n78.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:25Z",
      "native_id": "2608.22030",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.22030"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "A Cavity-Interfaced Register of Trapped-Ion Qubits with Multi-Second Coherence",
  "title_text": "A Cavity-Interfaced Register of Trapped-Ion Qubits with Multi-Second Coherence",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:25Z",
  "url": "https://research.draconitic.com/paper/0rczpybmk1n78",
  "venue": "arXiv",
  "versions": []
}