{
  "abstract": "We analyze a family of measurements obtained by retaining only a finite window of the photon-sum variable in catodyne detection, where a Schrödinger cat state serves as the local oscillator. In the continuum approximation, the window half-width appears to act as a continuous knob for coherence. However, a treatment on the discrete photon-number lattice shows that, in the strong-LO regime, the coherence conditioned on the difference outcome is not suppressed by the window. The exact parity-sensitive success probability is a staircase function of and , whose plateau structure and magnitude the continuum formulas fail to capture, especially for small and narrow windows. For remote preparation of cat states, an exact calculation with a finitely squeezed resource shows that the remote state keeps a purity close to one when x is resolved, and loses purity mainly when x is not recorded. Our results clarify where the continuum approximation of catodyne detection can be trusted and where the discrete photon-number structure must be used.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2610.41626",
  "author_total": 2,
  "authors": [
    {
      "name": "Elahe Nahvifard"
    },
    {
      "name": "Mohammad Reza Bazrafkan"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/00t35gsn8qpph.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2610.41626",
  "fulltext_url": null,
  "id": "00t35gsn8qpph",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2610.41626",
  "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",
      "quant-ph"
    ]
  ],
  "openalex": null,
  "pdf_url": "https://arxiv.org/pdf/2610.41626",
  "pmcid": null,
  "pmid": null,
  "published": "2026-10-30",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/00t35gsn8qpph.ris",
  "sources": [
    {
      "first_seen": "2026-11-02T12:21:15Z",
      "native_id": "2610.41626",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2610.41626"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Windowed Catodyne Measurements: Continuum Approximation versus Exact Discrete Photon-Number Treatment",
  "title_text": "Windowed Catodyne Measurements: Continuum Approximation versus Exact Discrete Photon-Number Treatment",
  "type": "preprint",
  "updated_at": "2026-11-04T15:20:51Z",
  "url": "https://research.draconitic.com/paper/00t35gsn8qpph",
  "venue": "arXiv",
  "versions": []
}