{
  "annotation_id": "e456af26-414a-45c4-b237-feedb49378a3",
  "date_created": "2026-03-02T18:02:27.665000Z",
  "date_modified": "2026-03-02T18:02:27.665000Z",
  "file_hash": "d82fc65321d6cf960ef0bdbd30506b37fa216b4e6a813b160365b267e976bc5a",
  "private": false,
  "record": {
    "abstract": "The quantum dynamics of M pairwise coupled spin 1/2 is analyzed and the time\nevolution of the entanglement get established within a prefixed couple of spins\nis studied. A conceptual and quantitative link between the concurrence function\nand measurable quantities is brought to light providing a physical\ninterpretation for the concurrence itself as well as a way to measure it. A\ngeneralized spin star system is exactly investigated showing that the\nentanglement accompanying its rich dynamics is traceable back to the covariance\nof appropriate commuting observables of the two spins.",
    "arxiv_id": "quant-ph/0606163",
    "authors": [
      "F. Palumbo",
      "A. Napoli",
      "A. Messina"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Interpreting concurrence in terms of covariances in a generalized spin   star system",
    "url": "https://arxiv.org/abs/quant-ph/0606163"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "83f214e5-8e1d-4d8f-8cef-0fbad6e31357",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}