{
  "annotation_id": "3b2f5a05-9d3b-4179-bbe9-b81f8303e443",
  "date_created": "2026-03-02T18:02:31.194000Z",
  "date_modified": "2026-03-02T18:02:31.194000Z",
  "file_hash": "07888556843abc6f0bc1fad211b7b88e3dd8806f4ac490585237806996d01182",
  "private": false,
  "record": {
    "abstract": "Quantum nonlocality of several four-qubit states is investigated by\nconstructing a new Bell inequality. These include the\nGreenberger-Zeilinger-Horne (GHZ) state, W state, cluster state, and the state\n$|\\chi\u003e$ that has been recently proposed in [PRL, {\\bf 96}, 060502 (2006)]. The\nBell inequality is optimally violated by $|\\chi\u003e$ but not violated by the GHZ\nstate. The cluster state also violates the Bell inequality though not\noptimally. The state $|\\chi\u003e$ can thus be discriminated from the cluster state\nby using the inequality. Different aspects of four-partite entanglement are\nalso studied by considering the usefulness of a family of four-qubit mixed\nstates as resources for two-qubit teleportation. Our results generalize those\nin [PRL, {\\bf 72}, 797 (1994)].",
    "arxiv_id": "quant-ph/0611172",
    "authors": [
      "Chunfeng Wu",
      "Ye Yeo",
      "L. C. Kwek",
      "C. H. Oh"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.032332",
    "title": "Quantum nonlocality of four-qubit entangled states",
    "url": "https://arxiv.org/abs/quant-ph/0611172"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7decd168-d300-4bf8-9897-b0db3ef982d8",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}