{
  "abstract": "Conventional spin squeezing enhances a single sensing channel. Here, we show how internal qudit levels enable simultaneous multiparameter squeezing within one ensemble. In two-component magnetometry, a qutrit sensor provides two orthogonal and weakly compatible channels. A collective twisting interaction squeezes both responses while preserving joint attainability of the ultimate sensitivity. The sensing gain is quantified by using a matrix generalization of the Wineland sensitivity that retains both noise correlations and cross-channel response. An interaction-based echo amplifies the signal to overcome noise from a fixed local joint readout, yielding a simulated $13~\\mathrm{dB}$ gain over the product-state standard quantum limit for $N=128$ qutrits. More generally, we use the single-site quantum Fisher information matrix to select reference states and channel quadratures for prescribed sensing tasks. The tangent geometry permits at most $d-1$ independent, weakly compatible channels around a common pure reference state for a $d$-level sensor. Our work provides a constructive task-to-protocol map for multiparameter squeezing in a single qudit ensemble.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2605.26377",
  "author_total": 4,
  "authors": [
    {
      "name": "Xiaoshui Lin"
    },
    {
      "name": "Chunlei Qu"
    },
    {
      "name": "Chong Zu"
    },
    {
      "name": "Chuanwei Zhang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2wk3k6rsx2qqt.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2605.26377",
  "fulltext_url": null,
  "id": "2wk3k6rsx2qqt",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2605.26377",
  "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",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7162545220",
  "pdf_url": "https://arxiv.org/pdf/2605.26377",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2wk3k6rsx2qqt.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:19Z",
      "native_id": "2605.26377",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2605.26377"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Single-Ensemble Multiparameter Squeezing with Qudits",
  "title_text": "Single-Ensemble Multiparameter Squeezing with Qudits",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:19Z",
  "url": "https://research.draconitic.com/paper/2wk3k6rsx2qqt",
  "venue": "arXiv",
  "versions": []
}