{
  "annotation_id": "38162a30-717c-49e2-9e19-d48ea4e9f1aa",
  "date_created": "2026-03-02T18:02:44.420000Z",
  "date_modified": "2026-03-02T18:02:44.420000Z",
  "file_hash": "5d9aef58b3b165cac0866240e65d5b41124f3a33a39261ccf5c019c7a283da0d",
  "private": false,
  "record": {
    "abstract": "We present the experimental observation of polarization entanglement for\nthree spatially separated photons. Such states of more than two entangled\nparticles, known as GHZ states, play a crucial role in fundamental tests of\nquantum mechanics versus local realism and in many quantum information and\nquantum computation schemes. Our experimental arrangement is such that we start\nwith two pairs of entangled photons and register one photon in a way that any\ninformation as to which pair it belongs to is erased. The registered events at\nthe detectors for the remaining three photons then exhibit the desired GHZ\ncorrelations.",
    "arxiv_id": "quant-ph/9810035",
    "authors": [
      "Dik Bouwmeester",
      "Jian-Wei Pan",
      "Matthew Daniell",
      "Harald Weinfurter",
      "Anton Zeilinger"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.82.1345",
    "journal_ref": "Phys.Rev.Lett. 82 (1999) 1345-1349",
    "title": "Observation of three-photon Greenberger-Horne-Zeilinger entanglement",
    "url": "https://arxiv.org/abs/quant-ph/9810035"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "82c064cf-ff5f-45a8-9d84-05d373008642",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}