{
  "abstract": "Ensemble nitrogen-vacancy (NV) diamond magnetometers combine high sensitivity with vector-field reconstruction, but practical deployment is limited by errors arising from high-frequency laser noise during short-duration operations and slow-varying gain fluctuations and offset drift during long-term operation. Here, we present an integrated digital architecture for achieving NV magnetometry stability across distinct timescales. A dynamic differential readout continuously balances fluorescence and reference channels to suppress correlated laser noise. Second-derivative Lorentzian lineshape tracking enables in-situ correction of slope variations arising from slow changes in gain and optical excitation. We further identify temperature-induced bias-magnet fluctuations as a dominant source of long-term drift and introduce a magnetic eigenvector transformation that uses the intrinsic response of NV resonances to eliminate these variations. We show, under unshielded ambient conditions, that this architecture achieves an off-resonance noise factor of 1.0 $\\pm$ 0.1, matching the fundamental limit with ten-fold suppression of long-term drift, enabling stable, field-ready quantum magnetometry.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.16901",
  "author_total": 8,
  "authors": [
    {
      "name": "Annirudh K P"
    },
    {
      "name": "Vinayak Rane"
    },
    {
      "name": "Shradha Atakar"
    },
    {
      "name": "Sanika Joshi"
    },
    {
      "name": "Maheshwar Mangat"
    },
    {
      "name": "Jay Gharat"
    },
    {
      "name": "Siddharth Tallur"
    },
    {
      "name": "Kasturi Saha"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bq3gp6yy8zpgw.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.16901",
  "fulltext_url": null,
  "id": "bq3gp6yy8zpgw",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.16901",
  "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",
      "physics.app-ph"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "2505|Diamond and Carbon-based Materials Research"
    ]
  ],
  "openalex": "W7213395457",
  "pdf_url": "https://arxiv.org/pdf/2609.16901",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-15",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bq3gp6yy8zpgw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:21:41Z",
      "native_id": "2609.16901",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.16901"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.app-ph",
      "subfield": "applied-instrumentation"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Portable Vector NV-Diamond Magnetometer for Shot-Noise-Limited, Drift-Free Operation in Unshielded Environments",
  "title_text": "Portable Vector NV-Diamond Magnetometer for Shot-Noise-Limited, Drift-Free Operation in Unshielded Environments",
  "type": "preprint",
  "updated_at": "2026-10-30T12:21:41Z",
  "url": "https://research.draconitic.com/paper/bq3gp6yy8zpgw",
  "venue": "arXiv",
  "versions": []
}