{
  "annotation_id": "8c66eded-04b8-4096-867c-7fc9cf41b207",
  "date_created": "2026-03-02T18:02:41.427000Z",
  "date_modified": "2026-03-02T18:02:41.427000Z",
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  "record": {
    "abstract": "We continue the analysis of our previous articles which were devoted to\ntype-I parametric down conversion, the extension to type-II being\nstraightforward. We show that entanglement, in the Wigner representation, is\njust a correlation that involves both signal and vacuum fluctuations. An\nanalysis of the detection process opens the way to a complete description of\nparametric down conversion in terms of pure Maxwell electromagnetic waves.",
    "arxiv_id": "quant-ph/9711042",
    "authors": [
      "Alberto Casado",
      "Trevor W. Marshall",
      "Emilio Santos"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1364/JOSAB.15.001572",
    "journal_ref": "Journal of the Optical Society of America B Vol. 15, Issue 5, pp.\n  1572-1577 (1998)",
    "title": "Type-II parametric down conversion in the Wigner-function formalism.   Entanglement and Bell\u0027s inequalities",
    "url": "https://arxiv.org/abs/quant-ph/9711042"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "eef72286-fd4d-4d59-a7e1-bed58fda4e1e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}