{
  "annotation_id": "7ec3eec9-d698-4ad8-92fd-31c603bb7126",
  "date_created": "2026-03-02T18:01:59.988000Z",
  "date_modified": "2026-03-02T18:01:59.988000Z",
  "file_hash": "7fed9029f9d818683e486e0381b92e71f327bd50232567d251e813c4f6bbad70",
  "private": false,
  "record": {
    "abstract": "Analytical expressions for the entanglement measures concurrence,\ni-concurrence and 3-tangle in terms of spin correlation functions are derived\nusing general symmetries of the quantum spin system. These relations are\nexploited for the one-dimensional XXZ-model, in particular the concurrence and\nthe critical temperature for disentanglement are calculated for finite systems\nwith up to six qubits. A recent NMR quantum error correction experiment is\nanalyzed within the framework of the proposed theoretical approach.",
    "arxiv_id": "quant-ph/0305108",
    "authors": [
      "Ulrich Glaser",
      "Helmut B\u00fcttner",
      "Holger Fehske"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.032318",
    "journal_ref": "Phys. Rev. A 68, 032318 (2003)",
    "title": "Entanglement and correlation in anisotropic quantum spin systems",
    "url": "https://arxiv.org/abs/quant-ph/0305108"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "28d839fc-bec7-4158-a454-c3427b6036c8",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}