{
  "abstract": "We report precision measurements of the ratio of Landé $g$ factors between the $3^2D_{5/2}$ and $4^2S_{1/2}$ states of a single trapped $^{40}\\text{Ca}^+$ ion. The measurements are performed in two distinct ion trap apparatus: a cryogenic surface electrode radiofrequency Paul trap and a room-temperature permanent magnet Penning trap. The Penning trap measurements rely on resonant microwave excitation of magnetic sublevels and yield a ratio of $0.599~488~813~3(2)$, which is a more than 40-fold uncertainty reduction compared to previous work. The radiofrequency trap measurements utilize optical electric quadrupole transitions and yield a concurring value of $0.599~488~813(6)$. We estimate that systematic shifts for each system are well below the respective statistical uncertainty.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.07929",
  "author_total": 8,
  "authors": [
    {
      "name": "Brian J. McMahon"
    },
    {
      "name": "Vikram S. Sandhu"
    },
    {
      "name": "John M. Gray"
    },
    {
      "name": "Creston D. Herold"
    },
    {
      "name": "Christopher M. Seck"
    },
    {
      "name": "Gilles Buchs"
    },
    {
      "name": "Kenton R. Brown"
    },
    {
      "name": "Brian C. Sawyer"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/aa33recdx5byw.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.07929",
  "fulltext_url": null,
  "id": "aa33recdx5byw",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.07929",
  "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",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Atomic and Molecular Physics"
    ]
  ],
  "openalex": "W7167918710",
  "pdf_url": "https://arxiv.org/pdf/2607.07929",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/aa33recdx5byw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:48Z",
      "native_id": "2607.07929",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.07929"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.atom-ph",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Dual-Platform Precision Measurement of the $3^2D_{5/2}$ to $4^2S_{1/2}$ $g$-Factor Ratio in $^{40}\\text{Ca}^+$",
  "title_text": "Dual-Platform Precision Measurement of the 3^2D_5/2 to 4^2S_1/2 g-Factor Ratio in ^40Ca^+",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:48Z",
  "url": "https://research.draconitic.com/paper/aa33recdx5byw",
  "venue": "arXiv",
  "versions": []
}