{
  "abstract": "We demonstrate the use of a superconducting mixer for direct searches for dark photon dark matter (DPDM) in the meV mass range. DPDM couples to the ordinary electromagnetic field through kinetic mixing with a coupling constant $χ$ and can convert into ordinary photons at the surface of a metal plate. For DPDM masses of 1 meV, the conversion photons have frequencies of around 240 GHz. At such frequencies, superconducting mixers enable low-noise spectroscopic measurements. We performed a direct search for DPDM in the mass range 1.0047578-1.0047598 meV, corresponding to the frequency range 242.94935-242.94983 GHz, using approximately one hour of data obtained with a cryogenic millimeter-wave receiver based on a superconducting mixer. No significant excess was found, and we set upper limits of $χ< (1.6\\text{-}1.9)\\times10^{-9}$ at the 95% confidence level. These limits are comparable to existing constraints from solar dark photons. By applying this method, we plan to extend the search to the wider mass range of 0.7-1.1 meV, corresponding to 170-260 GHz, with improved sensitivity.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2611.02734",
  "author_total": 9,
  "authors": [
    {
      "name": "K. Hanimura"
    },
    {
      "name": "S. Adachi"
    },
    {
      "name": "Y. Hasegawa"
    },
    {
      "name": "S. Honda"
    },
    {
      "name": "T. Nakajima"
    },
    {
      "name": "H. Ogawa"
    },
    {
      "name": "J. Suzuki"
    },
    {
      "name": "O. Tajima"
    },
    {
      "name": "H. Takeuchi"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/aap04brvbxvck.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2611.02734",
  "fulltext_url": null,
  "id": "aap04brvbxvck",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2611.02734",
  "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",
      "hep-ex"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2611.02734",
  "pmcid": null,
  "pmid": null,
  "published": "2026-11-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/aap04brvbxvck.ris",
  "sources": [
    {
      "first_seen": "2026-11-03T12:20:59Z",
      "native_id": "2611.02734",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2611.02734"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ex",
      "subfield": "high-energy"
    }
  ],
  "title": "Search for dark photon dark matter near $\\mathbf{1\\,meV}$ using a superconducting mixer",
  "title_text": "Search for dark photon dark matter near 1 meV using a superconducting mixer",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:58Z",
  "url": "https://research.draconitic.com/paper/aap04brvbxvck",
  "venue": "arXiv",
  "versions": []
}