{
  "abstract": "We present the concept of quadrature-detected zero-to-ultralow-field nuclear magnetic resonance (QD ZULF NMR). Two orthogonal sensors, atomic optically pumped magnetometers, are used to separately detect components of oscillating sample magnetization, which are then combined into a quadrature signal. This approach enables the distinction of positive and negative resonance frequencies with respect to the laboratory frame---such that absolute signs of gyromagnetic ratios can be determined. In addition, QD ZULF NMR reduces peak density and overlap compared to ZULF NMR with single-axis detection, while providing richer information about nuclear-spin dynamics. As an illustration, we present experimental $J$-spectra for thermally polarized [$^{13}$C]-formic acid and [$^{13}$C]-methanol, compounds commonly used in ZULF NMR which represent XA and XA$_3$ spin systems, respectively. A theoretical framework describing QD ZULF NMR signals is provided.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.14451",
  "author_total": 9,
  "authors": [
    {
      "name": "Anne M. Fabricant"
    },
    {
      "name": "Florin Teleanu"
    },
    {
      "name": "Adam Ortmeier"
    },
    {
      "name": "Piotr Put"
    },
    {
      "name": "Seth Dilday"
    },
    {
      "name": "Alexej Jerschow"
    },
    {
      "name": "Dmitry Budker"
    },
    {
      "name": "Thomas Theis"
    },
    {
      "name": "Danila A. Barskiy"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/360maw41g8jg2.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.14451",
  "fulltext_url": null,
  "id": "360maw41g8jg2",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.14451",
  "language": null,
  "licence": "CC-BY-NC-ND-4.0",
  "licence_label": "CC BY-NC-ND 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by-nc-nd/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "physics.chem-ph"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1607|Advanced NMR Techniques and Applications"
    ]
  ],
  "openalex": "W7221753177",
  "pdf_url": "https://arxiv.org/pdf/2610.14451",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-10",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/360maw41g8jg2.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:06Z",
      "native_id": "2610.14451",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.14451"
    }
  ],
  "subjects": [
    {
      "field": "chemistry",
      "origin": "arxiv:physics.chem-ph",
      "subfield": "physical"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Quadrature-detected zero-to-ultralow-field nuclear magnetic resonance",
  "title_text": "Quadrature-detected zero-to-ultralow-field nuclear magnetic resonance",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:06Z",
  "url": "https://research.draconitic.com/paper/360maw41g8jg2",
  "venue": "arXiv",
  "versions": []
}