{
  "abstract": "A gravitational-wave (GW) detector records a linear mixture of local couplings under the assumption that extra polarizations enter geodesic deviation. Vacuum general relativity (GR) admits two transverse-traceless (TT) amplitudes. It remains to determine the largest set of couplings that can sit in that mixture, and whether a tensor-only arm-length result selects GR uniquely. The little group \\(E(2)\\) of a null four-momentum classifies the strain amplitudes \\(\\mathbf{p}=(p_{+},p_{\\times},p_{x},p_{y},p_{b},p_{\\ell})\\), commonly written \\(h_{P}\\), which determine the electric tidal tensor along a ray. Geodesic deviation, recorded as differential arm length, therefore contains only those \\(p_{P}\\) that enter that tensor. Lorentz mixing at helicity \\(\\pm1\\) supplies a gravito-magnetic (GEM) field that does not enter the tidal tensor. if GEM field is static, that does not propagate as a wave. A time-varying helicity-\\(\\pm1\\) current sources a GEM wave that enters the mixture as a coupling, to be isolated by its measured quantity. For a radiation-zone wave that depends only on retarded time, \\(\\betag_{\\perp}=\\hat{\\mathbf{k}}\\times\\partial_{t}(p_{x},p_{y})\\), and the eight couplings are \\(\\Pvec=(\\mathbf{p},\\betag_{\\perp})\\). Here we adopt unified field equations on \\(\\mathbf{p}\\) to clarify the origin of each component of \\(\\Pvec\\); the measured quantity of each coupling then isolates the polarizations in that mixture, which favors identification of distinct polarizations and model tests.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.03979",
  "author_total": 2,
  "authors": [
    {
      "name": "Hong-Bo Jin"
    },
    {
      "name": "Yue-Liang Wu"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/b9fpjfsqwsww6.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.03979",
  "fulltext_url": null,
  "id": "b9fpjfsqwsww6",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.03979",
  "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.HE"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "openalex",
      "3103|Pulsars and Gravitational Waves Research"
    ]
  ],
  "openalex": "W7208755672",
  "pdf_url": "https://arxiv.org/pdf/2609.03979",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-03",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/b9fpjfsqwsww6.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:18:31Z",
      "native_id": "2609.03979",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.03979"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.HE",
      "subfield": "high-energy-astrophysics"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    }
  ],
  "title": "Eight Local Couplings of Gravitational Waves from Unified Field Equations",
  "title_text": "Eight Local Couplings of Gravitational Waves from Unified Field Equations",
  "type": "preprint",
  "updated_at": "2026-10-30T12:18:31Z",
  "url": "https://research.draconitic.com/paper/b9fpjfsqwsww6",
  "venue": "arXiv",
  "versions": []
}