{
  "abstract": "Nanophotonic cavities provide strong atom-photon coupling in a compact, directly fiber-coupled geometry, while a reconfigurable array of $^{171}$Yb atoms combines high-fidelity gates with a metastable qubit state coupled directly to a telecom-band transition, making the two a natural interface between neutral-atom quantum processors and telecom quantum networks. Here, we realize strong atom-cavity coupling on the ${}^{3}\\mathrm{P}_0 \\leftrightarrow {}^{3}\\mathrm{D}_1$ transition of ${}^{171}\\mathrm{Yb}$, establishing, to our knowledge, the first neutral-atom cavity-QED system to reach the single-atom strong-coupling regime on a telecom-band atomic transition. Reflection spectroscopy of a single-sided cavity yields a single-atom internal cooperativity of $C_{\\mathrm{in}}=5.6(1.0)$ and collective coupling following $\\sqrt{N}$ scaling up to $N=5$ atoms, with homogeneous coupling at antinodes over $\\sim$200 $\\mathrmμ$m along the nanofiber. Thermal tuning of a fiber Bragg grating provides in situ control of the cavity outcoupling rate over two orders of magnitude from the undercoupled to the overcoupled regime, relevant for various atom-cavity protocols. We confirm compatibility with reconfigurable atom arrays by demonstrating 99.95(6)\\% imaging fidelity and trap lifetimes comparable to free-space array, at 1 $\\mathrmμ$m from the nanofiber axis. Moreover, the diameter-engineered antireflection design of the nanofiber enables tweezer-based atom transport across the nanofiber with no measurable loss or heating at 4.5 $\\mathrmμ$m above the nanofiber, supporting a two-layer architecture for the nanofiber-integrated atom array. From the demonstrated atom-cavity coupling, atom capacity, and cavity mode profile, we project time-multiplexed remote atom-atom entanglement generation at 40 kHz, with prospects for further scaling through technical enhancements and channel multiplexing.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.25232",
  "author_total": 16,
  "authors": [
    {
      "name": "Hideki Ozawa"
    },
    {
      "name": "Neville Chen"
    },
    {
      "name": "Yusuke Hisai"
    },
    {
      "name": "Shunichiro Hashimoto"
    },
    {
      "name": "Kenichi N. Komagata"
    },
    {
      "name": "Remi T. Oddon"
    },
    {
      "name": "Shanjou Yang"
    },
    {
      "name": "Seitaro Horikawa"
    },
    {
      "name": "Seigo Kikura"
    },
    {
      "name": "Shigehito Miki"
    },
    {
      "name": "Takao Aoki"
    },
    {
      "name": "Tadayuki Yoshitake"
    },
    {
      "name": "Hideki Konishi"
    },
    {
      "name": "Shinichi Sunami"
    },
    {
      "name": "Akihisa Goban"
    },
    {
      "name": "Ryotaro Inoue"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1kek5b25sc9b2.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.25232",
  "fulltext_url": null,
  "id": "1kek5b25sc9b2",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.25232",
  "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",
      "cond-mat.quant-gas"
    ],
    [
      "arxiv",
      "physics.atom-ph"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Quantum optics and atomic interactions"
    ]
  ],
  "openalex": "W7214098519",
  "pdf_url": "https://arxiv.org/pdf/2609.25232",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-21",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1kek5b25sc9b2.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:56Z",
      "native_id": "2609.25232",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.25232"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Strong coupling of a reconfigurable ${}^{171}$Yb atom array to a tunable telecom-band nanofiber cavity",
  "title_text": "Strong coupling of a reconfigurable ^171Yb atom array to a tunable telecom-band nanofiber cavity",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:56Z",
  "url": "https://research.draconitic.com/paper/1kek5b25sc9b2",
  "venue": "arXiv",
  "versions": []
}