{
  "abstract": "We present and theoretically analyze a method for direct estimation of the second-order correlation function $g^{(2)}(0)$ from the click statistics of a multiplexed detector composed of M binary on-off detection channels. The method uses linear estimators of the first and second moments of the photon-number operator and can provide accurate results even for optical fields with substantial mean photon numbers. For a fixed number of channels, the detection range can be extended by introducing additional losses before the detector. We demonstrate the performance of the method for coherent, thermal, amplitude-squeezed, and photon-added coherent states. We also derive a nonclassicality criterion based on the estimated correlation function and show how the method can be adapted to unbalanced detectors. Our work establishes direct estimation of $g^{(2)}(0)$ as a simple and versatile method for quantitatively characterizing quantum light using multiplexed click detectors.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.03040",
  "author_total": 1,
  "authors": [
    {
      "name": "Jaromír Fiurášek"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bcbn6cb40tkq9.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.03040",
  "fulltext_url": null,
  "id": "bcbn6cb40tkq9",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.03040",
  "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",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7220424523",
  "pdf_url": "https://arxiv.org/pdf/2610.03040",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-02",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bcbn6cb40tkq9.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:26:45Z",
      "native_id": "2610.03040",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.03040"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Direct estimation of $g^{(2)}(0)$ from click statistics of a multiplexed detector",
  "title_text": "Direct estimation of g^(2)(0) from click statistics of a multiplexed detector",
  "type": "preprint",
  "updated_at": "2026-10-30T12:26:45Z",
  "url": "https://research.draconitic.com/paper/bcbn6cb40tkq9",
  "venue": "arXiv",
  "versions": []
}