{
  "annotation_id": "abe0df64-4c5b-4ccf-8a35-0b487130c9ec",
  "date_created": "2026-03-02T18:02:13.457000Z",
  "date_modified": "2026-03-02T18:02:13.457000Z",
  "file_hash": "cf661e3c4ca5d03d7588f5d815afd6e6f276d91f7807e29f2818f589819fc71a",
  "private": false,
  "record": {
    "abstract": "We show that the transfer of the plane wave spectrum of the pump beam to the\nfourth-order transverse spatial correlation function of the two-photon field\ngenerated by spontaneous parametric down-conversion leads to the conservation\nand entanglement of orbital angular momentum of light. By means of a simple\nexperimental setup based on fourth-order (or two-photon) interferometry, we\nshow that our theoretical model provides a good description for down-converted\nfields carrying orbital angular momentum.",
    "arxiv_id": "quant-ph/0503029",
    "authors": [
      "S. P. Walborn",
      "A. N. de Oliveira",
      "R. S. Thebaldi",
      "C. H. Monken"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.023811",
    "journal_ref": "Phys. Rev. A 69, 023811 (2004)",
    "title": "Entanglement and conservation of orbital angular momentum in spontaneous   parametric down-conversion",
    "url": "https://arxiv.org/abs/quant-ph/0503029"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b9b13186-0869-41ce-a159-f7ef813d7b7a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}