{
  "annotation_id": "f4fc5899-fff7-4f25-8055-3c6b29572335",
  "date_created": "2026-03-02T18:02:13.027000Z",
  "date_modified": "2026-03-02T18:02:13.027000Z",
  "file_hash": "ab1f6165a8571e12b53783d5c994d6a4bb5e74fbc4bb30867faa4fd0aa1bbbc6",
  "private": false,
  "record": {
    "abstract": "By using the concept of negativity, we study entanglement in spin-one\nHeisenberg chains. Both the bilinear chain and the bilinear-biquadratic chain\nare considered. Due to the SU(2) symmetry, the negativity can be determined by\ntwo correlators, which greatly facilitate the study of entanglement properties.\nAnalytical results of negativity are obtained in the bilinear model up to four\nspins and the two-spin bilinear-biquadratic model, and numerical results of\nnegativity are presented. We determine the threshold temperature before which\nthe thermal state is doomed to be entangled.",
    "arxiv_id": "quant-ph/0501032",
    "authors": [
      "XiaoGuang Wang",
      "HaiBin Li",
      "Zhe Sun",
      "You-Quan Li"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0305-4470/38/40/014",
    "title": "Entanglement in spin-one Heisenberg chains",
    "url": "https://arxiv.org/abs/quant-ph/0501032"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "eb302845-25ca-495f-8d23-a661400213bd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}