{
  "annotation_id": "51048f20-124c-4849-822b-432ad369d4dd",
  "date_created": "2026-03-02T18:01:46.127000Z",
  "date_modified": "2026-03-02T18:01:46.127000Z",
  "file_hash": "8ed6aef1190f29e83c90cd9a785766ac0684234a5ae1a585f1fa58b260b0745c",
  "private": false,
  "record": {
    "abstract": "It is shown that parametric downconversion, with a short-duration pump pulse\nand a long nonlinear crystal that is appropriately phase matched, can produce a\nfrequency-entangled biphoton state whose individual photons are coincident in\nfrequency. Quantum interference experiments which distinguish this state from\nthe familiar time-coincident biphoton state are described.",
    "arxiv_id": "quant-ph/0109135",
    "authors": [
      "Vittorio Giovannetti",
      "Lorenzo Maccone",
      "Jeffrey H. Shapiro",
      "Franco N. C. Wong"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.88.183602",
    "journal_ref": "Phys. Rev. Lett. 88, 183602 (2002)",
    "title": "Generating Entangled Two-Photon States with Coincident Frequencies",
    "url": "https://arxiv.org/abs/quant-ph/0109135"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "247a39f0-6175-42e2-91a2-ed7b95870d05",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}