{
  "annotation_id": "3f6238b4-6207-4988-8202-6b397f62bd90",
  "date_created": "2026-03-02T18:02:16.606000Z",
  "date_modified": "2026-03-02T18:02:16.606000Z",
  "file_hash": "9c7ec424f7f6e9f56b273e36ee719553893f453a26753292cdeedd6377b2bb90",
  "private": false,
  "record": {
    "abstract": "We derive spin squeezing inequalities that generalize the concept of the spin\nsqueezing parameter and provide necessary and sufficient conditions for genuine\n2-, or 3- qubit entanglement for symmetric states, and sufficient condition for\ngeneral states of $N$ qubits. Our inequalities have a clear physical\ninterpretation as entanglement witnesses, can be relatively easy measured, and\nare given by complex, but {\\it elementary} expressions.",
    "arxiv_id": "quant-ph/0504005",
    "authors": [
      "J. Korbicz",
      "J. I. Cirac",
      "M. Lewenstein"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.95.120502",
    "journal_ref": "Phys. Rev. Lett. 95, 120502 (2005)",
    "title": "Spin squeezing inequalities and entanglement of $N$ qubit states",
    "url": "https://arxiv.org/abs/quant-ph/0504005"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "41466db7-bd52-484a-bb2e-ea9c7c5230b4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}