{
  "annotation_id": "0c6ae4c6-ea8b-49b2-97b2-a78e0d2cce3d",
  "date_created": "2026-03-02T18:01:45.577000Z",
  "date_modified": "2026-03-02T18:01:45.577000Z",
  "file_hash": "9695c8d055d67f0cea9fbc4fd4a9473594a7187c491413cf6a21032b849a4e29",
  "private": false,
  "record": {
    "abstract": "We point out a loophole problem in some recent experimental claims to produce\nthree-particle entanglement. The problem consists in the question whether\nmixtures of two-particle entangled states might suffice to explain the\nexperimental data.\n  In an attempt to close this loophole, we review two sufficient conditions\nthat distinguish between N-particle states in which all N particles are\nentangled to each other and states in which only M particles are entangled\n(with M\u003cN). It is shown that three recent experiments to obtain three-particle\nentangled states (Bouwmeester et al., Pan et al., and Rauschenbeutel et al.) do\nnot meet these conditions. We conclude that the question whether these\nexperiments provide confirmation of three-particle entanglement remains\nunresolved. We also propose modifications of the experiments that would make\nsuch confirmation feasible.",
    "arxiv_id": "quant-ph/0107072",
    "authors": [
      "Michael Seevinck",
      "Jos Uffink"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.65.012107",
    "journal_ref": "Phys. Rev. A, volume 65, 012107 (2002)",
    "title": "Sufficient conditions for three-particle entanglement and their tests in   recent experiments",
    "url": "https://arxiv.org/abs/quant-ph/0107072"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6d0b3f32-c844-4651-ac63-f842cd041181",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}