{
  "abstract": "Parity violation in the early Universe may lead to a chiral gravitational wave background. We show that, for finite-time parity-violating sources, the low-frequency tail of the generated chiral gravitational wave background is universally unpolarized, and that the chirality fraction decreases linearly with frequency. Our result generally applies to any parity-violating gravitational-wave source that appears quadratically in the wave equation. We consider both Gaussian sources and explicit trispectrum templates. We attribute the lack of chirality of the low-frequency tail to the fact that, on large scales, gravitational wave generation is almost equally inefficient for both helicities.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.28828",
  "author_total": 4,
  "authors": [
    {
      "name": "Tikinas Chabour"
    },
    {
      "name": "Guillem Domènech"
    },
    {
      "name": "Alexander Ganz"
    },
    {
      "name": "Jan Tränkle"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bvps7v4t3feg1.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.28828",
  "fulltext_url": null,
  "id": "bvps7v4t3feg1",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.28828",
  "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",
      "astro-ph.CO"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "openalex",
      "3103|Cosmology and Gravitation Theories"
    ]
  ],
  "openalex": "W7214307681",
  "pdf_url": "https://arxiv.org/pdf/2609.28828",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-23",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bvps7v4t3feg1.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:24:11Z",
      "native_id": "2609.28828",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.28828"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.CO",
      "subfield": "cosmology"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Unpolarized Low-Frequency Tail of Causal Chiral Gravitational Waves",
  "title_text": "Unpolarized Low-Frequency Tail of Causal Chiral Gravitational Waves",
  "type": "preprint",
  "updated_at": "2026-10-30T12:24:11Z",
  "url": "https://research.draconitic.com/paper/bvps7v4t3feg1",
  "venue": "arXiv",
  "versions": []
}