{
  "annotation_id": "706025af-fdae-43c1-ae27-493c2808e1a5",
  "date_created": "2026-03-02T18:02:20.690000Z",
  "date_modified": "2026-03-02T18:02:20.690000Z",
  "file_hash": "95a885b2e2c1730bb67ac2a109ff449d8770fa565b5b0f4283c0387389e30575",
  "private": false,
  "record": {
    "abstract": "The process of spontaneous parametric down-conversion (SPDC) in nonlinear\ncrystals makes it fairly easy to generate entangled photon states. It has been\nknown for some time that the conversion efficiency can be improved by employing\nquasi-phase-matching in periodically poled crystals. Using two single-photon\ndetectors, we have analyzed the photon pairs generated by SPDC in a\nperiodically poled lithium niobate crystal pumped by a femtosecond laser.\nSeveral parameters could be varied in our setup, allowing us to obtain data in\nclose agreement with both thermal and Poissonian photon-pair distributions.",
    "arxiv_id": "quant-ph/0511128",
    "authors": [
      "Jonas Soderholm",
      "Keiichi Hirano",
      "Shigehiko Mori",
      "Shuichiro Inoue",
      "Sunao Kurimura"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1142/9789812773210_0011",
    "title": "Analysis of the generation of photon pairs in periodically poled lithium   niobate",
    "url": "https://arxiv.org/abs/quant-ph/0511128"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "306c66d2-7ed8-4182-96de-40d94a0b06a5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}