{
  "abstract": "We study the extended Dicke model obtained from the scalar--vector--tensor polarizability of open-shell atoms coupled to a shared cavity mode. For a single electric-dipole channel, rotational symmetry fixes the tensor to vector ratio; we use $^{168}\\mathrm{Er}$ with $J=6$ as a product-state example. A circular pump produces a chiral Raman vertex whose tensor-dependent matrix elements select the occupied Zeeman sector. The resulting first-order transition occurs before the empty-cavity branch loses local stability, and the ordered state is read out through $\\langle\\hat J_z\\rangle$. A linear pump instead produces an empty-cavity $\\pm x$ cat and a continuous transition into an even-$m$ cat-like state with order parameter $\\langle\\hat J_z^2\\rangle$. With cavity loss alone, the circular trajectory emits a photon burst and approaches a Raman-dark Zeeman pole rather than a finite-field condensate. In the linear geometry, cavity-bright modes are damped toward the cat-like branch while a dark spin mode remains undamped. These are phenomena of that model; the vector-only controls show that they depend on the channel-fixed tensor coupling.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.20043",
  "author_total": 2,
  "authors": [
    {
      "name": "Ziheng Zhu"
    },
    {
      "name": "Yu Chen"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/e0trc4771tsqj.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.20043",
  "fulltext_url": null,
  "id": "e0trc4771tsqj",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.20043",
  "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",
      "cond-mat.quant-gas"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "3107|Strong Light-Matter Interactions"
    ]
  ],
  "openalex": "W7222353493",
  "pdf_url": "https://arxiv.org/pdf/2610.20043",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/e0trc4771tsqj.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:31Z",
      "native_id": "2610.20043",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.20043"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "condensed-matter"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Dicke model of open-shell atoms with tensor polarizability",
  "title_text": "Dicke model of open-shell atoms with tensor polarizability",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:31Z",
  "url": "https://research.draconitic.com/paper/e0trc4771tsqj",
  "venue": "arXiv",
  "versions": []
}