{
  "annotation_id": "68392148-8ef0-43a8-9ee2-e74adfccc701",
  "date_created": "2026-03-02T18:02:10.381000Z",
  "date_modified": "2026-03-02T18:02:10.381000Z",
  "file_hash": "03dcf0049728b2b6204340206f62c686429c21e8f45bbb5074da77884df848df",
  "private": false,
  "record": {
    "abstract": "We study the entanglement feature of the ground state of a system composed of\nspin 1 and 1/2 parts. The concurrence vector is shown to be consistent with the\nmeasurement of von Neumann entropy for such system. In the light of the ground\nstate degeneracy, we suggest a average concurrence to measure the entanglement\nof Hilbert subspace. The entanglement property of both a general superposition\nas well as the mixture of the degenerate ground states are discussed by means\nof average concurrence and the negativity respectively.",
    "arxiv_id": "quant-ph/0408155",
    "authors": [
      "You-Quan Li",
      "Guo-Qiang Zhu",
      "Xue-An Zhao"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Entanglement of degenerate ground state for spin 1 and 1/2 pair",
    "url": "https://arxiv.org/abs/quant-ph/0408155"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2adcbc40-8ac0-40a7-8ffc-aaf05e6b979c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}