{
  "abstract": "Parity violation in the gravitational and electromagnetic sectors has been extensively investigated, yet the two are conventionally treated as independent phenomena. This separation, however, may be a four-dimensional prejudice. In higher-dimensional spacetime, gravity and electromagnetism may share a common geometric origin---and so, perhaps, does their parity violation. In this paper, we pursue this idea by constructing parity-violating Kaluza-Klein models in both Riemannian and teleparallel geometries. In Riemannian geometry, the simplest five-dimensional parity-violating term reduces to several complicated four-dimensional terms, including the familiar gravitational Chern-Simons term, which suffers from a ghost instability. In teleparallel geometry, however, the result is strikingly simple. The simplest five-dimensional parity-violating term reduces to only two ghost-free terms---the familiar Nieh-Yan term and the standard electromagnetic Chern-Simons term. Remarkably, the model predicts that the helicity-dependent dispersion shift for electromagnetic waves is exactly six times that for gravitational waves, $Δω^{2}_{ EM}=6\\,Δω^{2}_{GW}$, a background-independent relation. This relation offers a falsifiable test of unification through joint cosmic microwave background and gravitational wave birefringence observations.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2608.09299",
  "author_total": 5,
  "authors": [
    {
      "name": "Haomin Rao"
    },
    {
      "name": "Yunlong Zheng"
    },
    {
      "name": "Qi-Zhe Hou"
    },
    {
      "name": "Jian-Wen Ou"
    },
    {
      "name": "Changyong Zhu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/34hqeetggst9d.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2608.09299",
  "fulltext_url": null,
  "id": "34hqeetggst9d",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2608.09299",
  "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",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7202210424",
  "pdf_url": "https://arxiv.org/pdf/2608.09299",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/34hqeetggst9d.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:31Z",
      "native_id": "2608.09299",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2608.09299"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Correlated parity violation in gravity and electromagnetism from five-dimensional spacetime",
  "title_text": "Correlated parity violation in gravity and electromagnetism from five-dimensional spacetime",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:31Z",
  "url": "https://research.draconitic.com/paper/34hqeetggst9d",
  "venue": "arXiv",
  "versions": []
}