{
  "annotation_id": "ffae5f48-2005-4097-985d-e79f1045ed63",
  "date_created": "2026-03-02T18:01:38.781000Z",
  "date_modified": "2026-03-02T18:01:38.781000Z",
  "file_hash": "2e29944e84b83e200f49583b65980ec50e4bf532cf071b8de68b2cd1357126c3",
  "private": false,
  "record": {
    "abstract": "The decay of ortho-positronium into three photons produces a physical\nrealization of a pure state with three-party entanglement. Its quantum\ncorrelations are analyzed using recent results on quantum information theory,\nlooking for the final state which has the maximal amount of GHZ-like\ncorrelations. This state allows for a statistical dismissal of local realism\nstronger than the one obtained using any entangled state of two spin one-half\nparticles.",
    "arxiv_id": "quant-ph/0007080",
    "authors": [
      "A. Acin",
      "J. I. Latorre",
      "P. Pascual"
    ],
    "categories": [
      "quant-ph",
      "hep-ph"
    ],
    "doi": "10.1103/PhysRevA.63.042107",
    "journal_ref": "Phys.Rev. A63 (2001) 042107",
    "title": "Three-party entanglement from positronium",
    "url": "https://arxiv.org/abs/quant-ph/0007080"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8dc7a670-2182-401c-b2f0-f38c494088bd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}