{
  "abstract": "We investigate the ground-state properties of a two-component attractive Fermi gas confined to a spherical surface, demonstrating how curvature and finite-size effects lead to qualitatively different behavior compared to the planar limit. In the strongly attractive regime, the system forms a Bose-Einstein condensate (BEC) of tightly bound dimers, yielding a gap and chemical potential that approach flat-space results with leading-order geometric corrections. However, as the attraction decreases, the system crosses over into a Bardeen-Cooper-Schrieffer (BCS) regime where the Cooper pair size becomes constrained by the sphere radius, producing pronounced deviations from flat-space behavior. We identify strong shell effects at magic particle numbers set by the single-particle spectrum, revealing the geometry-driven suppression of fermionic pairing at weak interactions. Our results highlight a fundamental interplay among geometry, quantum statistics, and interactions, motivating future experiments with shell-trapped ultracold fermions and inspiring geometry-controlled condensed matter devices.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.18386",
  "author_total": 3,
  "authors": [
    {
      "name": "Lorenzo Frigato"
    },
    {
      "name": "Andrea Tononi"
    },
    {
      "name": "Luca Salasnich"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/2zvwpbrwgs0wn.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.18386",
  "fulltext_url": null,
  "id": "2zvwpbrwgs0wn",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.18386",
  "language": null,
  "licence": "CC-BY-4.0",
  "licence_label": "CC BY 4.0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/licenses/by/4.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "cond-mat.quant-gas"
    ],
    [
      "openalex",
      "3107|Cold Atom Physics and Bose-Einstein Condensates"
    ]
  ],
  "openalex": "W7213522613",
  "pdf_url": "https://arxiv.org/pdf/2609.18386",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-16",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/2zvwpbrwgs0wn.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:22:01Z",
      "native_id": "2609.18386",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.18386"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:cond-mat.quant-gas",
      "subfield": "condensed-matter"
    }
  ],
  "title": "Geometry-Driven Suppression of Fermionic Pairing on a Spherical Surface",
  "title_text": "Geometry-Driven Suppression of Fermionic Pairing on a Spherical Surface",
  "type": "preprint",
  "updated_at": "2026-11-05T15:20:17Z",
  "url": "https://research.draconitic.com/paper/2zvwpbrwgs0wn",
  "venue": "arXiv",
  "versions": []
}