{
  "abstract": "We propose a new method for detecting dark matter axions using a resonant cavity coupled to a two-dimensional electron system in the quantum Hall regime. When the cavity is tuned to the axion frequency, the axion-induced electromagnetic field is resonantly enhanced and drives a transverse Hall current in the quantum Hall system. On a quantum Hall plateau, the longitudinal dissipative response is strongly suppressed, $\\mathrm{Re}(σ_{xx})\\simeq0$, while the Hall conductivity remains finite and quantized, $\\mathrm{Re}(σ_{xy})=νe^2/h$. Consequently, the Hall current is essentially nondissipative and introduces only a small additional loss to the cavity, allowing the loaded quality factor to approach the unloaded value, $Q_L\\simeq Q_0$. The resulting Hall current is therefore enhanced by the large cavity quality factor, $I_H\\propto\\mathrm{Re}(σ_{xy})E\\propto Q_L$. For a 2D electron density of $3\\times10^{11}\\mathrm{cm}^{-2}$, filling factor $ν=2$, and $Q_L\\sim10^5$--$10^6$, we estimate a Hall current of order $I_H\\sim10^{-13}$--$10^{-12}\\mathrm{A}$ for an axion mass $m_a\\sim10^{-5}\\mathrm{eV}$ and a magnetic field $\\sim 5\\times 10^4\\mathrm{G}$. The current is more enhanced by increasing the size of 2D electrons keeping the strength of magnetic field. Under the assumed thermal-noise level and readout conditions, the estimated Hall-current signal can achieve a signal-to-noise ratio greater than unity for an observation time of order $100\\mathrm{s}$. The proposed method exploits the unique combination of a finite, quantized transverse response and a strongly suppressed longitudinal dissipation in the quantum Hall state, providing an alternative to conventional metallic-antenna detection in axion haloscopes.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2607.19888",
  "author_total": 1,
  "authors": [
    {
      "name": "Aiichi Iwazaki"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/7g5k2rr78atnw.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2607.19888",
  "fulltext_url": null,
  "id": "7g5k2rr78atnw",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2607.19888",
  "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-ph"
    ],
    [
      "openalex",
      "3106|Dark Matter and Cosmic Phenomena"
    ]
  ],
  "openalex": "W7170137916",
  "pdf_url": "https://arxiv.org/pdf/2607.19888",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-07",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/7g5k2rr78atnw.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:27:37Z",
      "native_id": "2607.19888",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2607.19888"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:hep-ph",
      "subfield": "high-energy"
    }
  ],
  "title": "Power of Axion Microwave Absorbed by Quantum Hall State in Haloscope",
  "title_text": "Power of Axion Microwave Absorbed by Quantum Hall State in Haloscope",
  "type": "preprint",
  "updated_at": "2026-10-30T12:27:37Z",
  "url": "https://research.draconitic.com/paper/7g5k2rr78atnw",
  "venue": "arXiv",
  "versions": []
}