{
  "abstract": "We investigate the Casimir effect of a complex scalar field on a two-dimensional sphere threaded by a fixed Wu--Yang magnetic monopole at the center. In this background the charged scalar field is a section of a nontrivial complex line bundle over $S^2$, reflecting the monopole's nontrivial topology. We solve the Klein--Gordon equation analytically and compute the Casimir energy using a generalized Abel--Plana formula for multivalued functions. We find that the monopole can reverse the sign of the Casimir pressure, turning an attractive force into a repulsive one when the monopole strength is sufficiently large. This behavior persists across a broad range of curvature couplings and suggests that Wu--Yang monopoles may provide a source of repulsive vacuum stress, with possible implications for gravitational and cosmological settings.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.08378",
  "author_total": 4,
  "authors": [
    {
      "name": "Jun-Cheng Zhang"
    },
    {
      "name": "Xiao-Yin Pan"
    },
    {
      "name": "Juhao Wu"
    },
    {
      "name": "Qing-hai Wang"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/85q4yb5zpse56.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.08378",
  "fulltext_url": null,
  "id": "85q4yb5zpse56",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.08378",
  "language": null,
  "licence": "CC0-1.0",
  "licence_label": "CC0",
  "licence_source": "article",
  "licence_url": "http://creativecommons.org/publicdomain/zero/1.0/",
  "metadata_licence": "CC0-1.0",
  "native_subjects": [
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3107|Quantum Electrodynamics and Casimir Effect"
    ]
  ],
  "openalex": "W7212033188",
  "pdf_url": "https://arxiv.org/pdf/2609.08378",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-09",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/85q4yb5zpse56.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:20:12Z",
      "native_id": "2609.08378",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.08378"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Scalar Casimir Effect on a Two-Dimensional Sphere with a Wu--Yang Magnetic Monopole",
  "title_text": "Scalar Casimir Effect on a Two-Dimensional Sphere with a Wu--Yang Magnetic Monopole",
  "type": "preprint",
  "updated_at": "2026-10-30T12:20:12Z",
  "url": "https://research.draconitic.com/paper/85q4yb5zpse56",
  "venue": "arXiv",
  "versions": []
}