{
  "abstract": "By employing SWAP Monte Carlo moves during slow Lubachevsky-Stillinger-like particle growth, we generate well-thermalized disordered jammed ellipse packings for a wide range of particle aspect ratios $α$ and maximum/minimum particle-diameter ratios $λ$. For $λ> λ_{\\rm xtal}(α)$, the packings are denser than the perfect monodisperse ellipse crystal ($ϕ_{\\rm xtal}^{\\rm mono} = π/2\\sqrt{3} \\simeq 0.9069$) despite lacking any obvious long-range structural order; we find that $λ_{\\rm xtal}(α)$ remains below $2.88$ over the range $1 \\leq α\\leq 5$, and drops below $1.65$ for $α\\simeq 1.2$. These disordered $ϕ> ϕ_{\\rm xtal}^{\\rm mono}$ packings are the first of their kind reported for anisotropic particles. Multiscale analyses reveal that their characteristic structural motifs are strongly $α$- and $λ$-dependent, but none of the examined metrics change sharply as the $λ= λ_{\\rm xtal}(α)$ boundary is crossed. For example, we find that packings with $α\\simeq 1.2$ and $λ\\simeq λ_{\\rm xtal}(α)$ exhibit a fractionated-hexatic-plastic-polycrystalline structure that (like that of the recently-reported ideal disk glasses) can be exactly-isostatic, triangulated, and effectively-hyperuniform with respect to packing-fraction fluctuations. In contrast, even-denser packings with larger $α$ and $λ$ have none of these properties.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.20953",
  "author_total": 4,
  "authors": [
    {
      "name": "Kinsley G. Trlak"
    },
    {
      "name": "Dewni S. de Silva"
    },
    {
      "name": "Salvatore Torquato"
    },
    {
      "name": "Robert S. Hoy"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/1gf2qkz75h8j3.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.20953",
  "fulltext_url": null,
  "id": "1gf2qkz75h8j3",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.20953",
  "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.soft"
    ],
    [
      "openalex",
      "2505|Material Dynamics and Properties"
    ]
  ],
  "openalex": "W7222745250",
  "pdf_url": "https://arxiv.org/pdf/2610.20953",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/1gf2qkz75h8j3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:50Z",
      "native_id": "2610.20953",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.20953"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.soft",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Denser-than-crystalline disordered polydisperse ellipse packings",
  "title_text": "Denser-than-crystalline disordered polydisperse ellipse packings",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:50Z",
  "url": "https://research.draconitic.com/paper/1gf2qkz75h8j3",
  "venue": "arXiv",
  "versions": []
}