{
  "abstract": "Imperfect photon sources degrade the performance of interference-based linear-optical entangling gates. We derive a universal fidelity law for these gates in terms of two standard source metrics: Hong-Ou-Mandel visibility and second-order coherence. We model the multiphoton component as an arbitrary overlap between noise and signal photons. While different values of the signal-noise overlap produce different error structures, associated with different physical platforms, all result in the same fidelity law. We test the model on our actively synchronized CNOT-gate experiment and against published results across different platforms, with no free parameters. This framework turns source characterization into a unified benchmark for photonic quantum computing.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.25861",
  "author_total": 2,
  "authors": [
    {
      "name": "Haim Nakav"
    },
    {
      "name": "Ofer Firstenberg"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/bkjq4dyg3t4k3.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.25861",
  "fulltext_url": null,
  "id": "bkjq4dyg3t4k3",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.25861",
  "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",
      "physics.atom-ph"
    ],
    [
      "arxiv",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7214121108",
  "pdf_url": "https://arxiv.org/pdf/2609.25861",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-22",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/bkjq4dyg3t4k3.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:23:39Z",
      "native_id": "2609.25861",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.25861"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.atom-ph",
      "subfield": "amo"
    },
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Universal Fidelity Law for Linear-Optical Entangling Gates",
  "title_text": "Universal Fidelity Law for Linear-Optical Entangling Gates",
  "type": "preprint",
  "updated_at": "2026-10-30T12:23:39Z",
  "url": "https://research.draconitic.com/paper/bkjq4dyg3t4k3",
  "venue": "arXiv",
  "versions": []
}