{
  "abstract": "Spontaneous parametric down-conversion is a primary resource for generating non-classical light, yet phase mismatch fluctuations from temperature drift, angular misalignment, and domain fabrication errors reduce pair-generation efficiency and phase stability. Here, we analyze error mitigation in spontaneous parametric down-conversion using composite segmentation governed by SU(1, 1) spatial dynamics. We show that odd spatial Fourier harmonics preserve error-cancellation flatness with pair-generation rates scaling asymptotically as $m^{-2}$, while a coordinate-dilation symmetry provides a design prescription for translating configurations across distinct operating wavelengths (405, 532, and 775 nm). Furthermore, an open-loop thermo-optic bias counteracts off-axis angular drift to broaden the 90%-efficiency angular acceptance half-width by 3.46x, and up to two missing poling domains are tolerated with no numerically resolved loss in relative conversion efficiency. Across a 5$^\\circ$C thermal window, the generated pairs sustain a relative conversion efficiency of $η\\ge 0.954$ with the modeled phase-coherence metric remaining above 0.95, providing a structurally robust approach for entangled photon generation without requiring continuous closed-loop feedback stabilization.",
  "abstract_shown": true,
  "affiliations": [],
  "article_type": null,
  "arxiv": "2609.37514",
  "author_total": 2,
  "authors": [
    {
      "name": "Nastaran Ragerdi Kashani"
    },
    {
      "name": "Rouhollah Karimzadeh"
    }
  ],
  "bibtex": "https://research.draconitic.com/paper/fgw0deqx5er80.bib",
  "cited_by": 0,
  "doi": "10.48550/arxiv.2609.37514",
  "fulltext_url": null,
  "id": "fgw0deqx5er80",
  "issns": [],
  "landing_url": "https://arxiv.org/abs/2609.37514",
  "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",
      "physics.optics"
    ],
    [
      "arxiv",
      "quant-ph"
    ],
    [
      "openalex",
      "1702|Quantum Information and Cryptography"
    ]
  ],
  "openalex": "W7214890290",
  "pdf_url": "https://arxiv.org/pdf/2609.37514",
  "pmcid": null,
  "pmid": null,
  "published": "2026-09-29",
  "publisher": null,
  "ris": "https://research.draconitic.com/paper/fgw0deqx5er80.ris",
  "sources": [
    {
      "first_seen": "2026-10-30T12:25:31Z",
      "native_id": "2609.37514",
      "source": "arxiv",
      "url": "https://arxiv.org/abs/2609.37514"
    }
  ],
  "subjects": [
    {
      "field": "physics",
      "origin": "arxiv:physics.optics",
      "subfield": "optics-photonics"
    },
    {
      "field": "physics",
      "origin": "arxiv:quant-ph",
      "subfield": "quantum"
    }
  ],
  "title": "Multi-Parameter Error Mitigation in Parametric Down-Conversion via SU(1, 1) Composite Segmentation",
  "title_text": "Multi-Parameter Error Mitigation in Parametric Down-Conversion via SU(1, 1) Composite Segmentation",
  "type": "preprint",
  "updated_at": "2026-10-30T12:25:31Z",
  "url": "https://research.draconitic.com/paper/fgw0deqx5er80",
  "venue": "arXiv",
  "versions": []
}