{
  "abstract": "Ultraviolet-softened extensions of general relativity can weaken gravity at short distances, whereas a positive Källén--Lehmann spectral density forbids gravity from falling below Newtonian strength. Which property of the mediator must such a weakening sacrifice? For Lorentz-invariant Gaussian mediators coupled linearly to the conserved stress tensor, we formulate three independent interferometric conditions that jointly imply this bound: visibility is never amplified, decoherence is fixed by the energy radiated by the difference source, and no interferometer responds to a later one. At tree level, the three ghost prescriptions of quadratic gravity each violate exactly one: negative-norm ghosts amplify coherence, negative-energy ghosts decohere without positive energy transfer from the difference source, and a time-symmetric fakeon response produces advanced fringe shifts. Any universal short-distance weakening of gravity therefore certifies that its mediator violates one of these conditions, and the observables proposed to certify quantum gravity become consistency tests of its ultraviolet completion.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.25994",
  "author_total": 1,
  "authors": [
    {
      "name": "Hiroki Matsui"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/45zgc5t03gd2j.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.25994",
  "fulltext_url": null,
  "id": "45zgc5t03gd2j",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.25994",
  "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",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-th"
    ],
    [
      "openalex",
      "3109|Noncommutative and Quantum Gravity Theories"
    ]
  ],
  "openalex": "W7223012584",
  "pdf_url": "https://arxiv.org/pdf/2610.25994",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-19",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/45zgc5t03gd2j.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:30:52Z",
      "native_id": "2610.25994",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.25994"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-th",
      "subfield": "high-energy"
    }
  ],
  "title": "Interferometric trilemma for ultraviolet-softened gravity",
  "title_text": "Interferometric trilemma for ultraviolet-softened gravity",
  "type": "preprint",
  "updated_at": "2026-10-30T12:33:41Z",
  "url": "https://research.draconitic.com/paper/45zgc5t03gd2j",
  "venue": "arXiv",
  "versions": []
}