{
  "abstract": "We present the first calculation showing that a material-asymmetric Sagnac speed meter can improve quantum-noise-limited sensitivity to $B-L$ vector dark matter by nearly two orders of magnitude over a Fabry--Perot Michelson position meter at the low-mass end of the band. We introduce material contrast into a dual-ring interferometer to probe composition-dependent $B-L$ forces and compare the two configurations at equal incident power, input-mirror transmissivity, and cavity round-trip length. For sapphire mirrors and a one-week benchmark, the quantum-noise-only median expected $95\\%$ CL upper limit reaches $1.2\\times10^{-27}$ at $m_A=4.1\\times10^{-14}\\,\\mathrm{eV}/c^2$ ($10\\,\\mathrm{Hz}$), a factor-$57$ improvement. This band-edge forecast assumes negligible classical noise; sensitivity at $10\\,\\mathrm{Hz}$ is not established for a realizable suspension and isolation system. The material-induced displacement is essentially identical in both configurations, with the gain arising from reduced low-frequency quantum backaction. These results identify speed-meter readout as a promising route to lower-mass vector-dark-matter searches.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.04626",
  "author_total": 3,
  "authors": [
    {
      "name": "Yuki Inoue"
    },
    {
      "name": "Quynh Lan Nguyen"
    },
    {
      "name": "Ippei Obata"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/5kztya0bpjjfk.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.04626",
  "fulltext_url": null,
  "id": "5kztya0bpjjfk",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.04626",
  "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.IM"
    ],
    [
      "arxiv",
      "gr-qc"
    ],
    [
      "arxiv",
      "hep-ex"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "openalex",
      "3106|Dark Matter and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7220745280",
  "pdf_url": "https://arxiv.org/pdf/2610.04626",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-14",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/5kztya0bpjjfk.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:29:31Z",
      "native_id": "2610.04626",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.04626"
    }
  ],
  "subjects": [
    {
      "field": "astronomy",
      "origin": "arxiv:astro-ph.IM",
      "subfield": "instrumentation-methods"
    },
    {
      "field": "physics",
      "origin": "arxiv:gr-qc",
      "subfield": "gravitation"
    },
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    }
  ],
  "title": "Vector field dark matter search with Sagnac interferometer",
  "title_text": "Vector field dark matter search with Sagnac interferometer",
  "type": "preprint",
  "updated_at": "2026-10-30T12:29:31Z",
  "url": "https://research.draconitic.com/paper/5kztya0bpjjfk",
  "venue": "arXiv",
  "versions": []
}