{
  "abstract": "Trapped-ion quantum networks rely on efficient ion-photon interfaces, while objective-based free-space collection systems must balance high photon collection with sufficient working distance for practical integration with ion-trap hardware. Here, we design and characterize an ion-photon interface with a long working distance of 26.15 mm and a high numerical aperture of 0.5. The core of the interface is a photon-collection objective consisting of six commercial spherical lenses with optimized spacing. The interface achieved an overall fiber-coupled photon-detection efficiency of (1.29$\\pm$0.09)% from the ion to the detector and maintains fiber coupling over several hours without active realignment, supporting stable operation of the ion-to-fiber interface. Photon-correlation measurements show clear antibunching in the fiber-coupled fluorescence, confirming the preservation of non-classical photon statistics. These results demonstrate a practical implementation of a long-working-distance photon collection interface for trapped-ion quantum network experiments.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.25598",
  "author_total": 5,
  "authors": [
    {
      "name": "Jungwoo Choi"
    },
    {
      "name": "Inhyuk Oh"
    },
    {
      "name": "Chanyang Im"
    },
    {
      "name": "Gibeom Son"
    },
    {
      "name": "Junki Kim"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/dhh0pm1t8a3gn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.25598",
  "fulltext_url": null,
  "id": "dhh0pm1t8a3gn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.25598",
  "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",
      "physics.atom-ph"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7214104090",
  "pdf_url": "https://arxiv.org/pdf/2609.25598",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/dhh0pm1t8a3gn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2609.25598",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.25598"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.atom-ph",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Efficient Ion-Photon Quantum Interface with Long-Working-Distance Exceeding 26 mm",
  "title_text": "Efficient Ion-Photon Quantum Interface with Long-Working-Distance Exceeding 26 mm",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/dhh0pm1t8a3gn",
  "venue": "arXiv",
  "versions": []
}