{
  "annotation_id": "37433056-1551-4707-bd18-175596ced682",
  "date_created": "2026-03-02T18:02:13.041000Z",
  "date_modified": "2026-03-02T18:02:13.041000Z",
  "file_hash": "d8295186d300fa088971a016376a51d333e575406ee66bde5ba1efeff7a47769",
  "private": false,
  "record": {
    "abstract": "We study entanglement in dimerized Heisenberg systems. In particular, we give\nexact results of ground-state pairwise entanglement for the four-qubit model by\nidentifying a Z_2 symmetry. Although the entanglements cannot identify the\ncritical point of the system, the mean entanglement of nearest-neighbor qubits\nreally does, namely, it reaches a maximum at the critical point.",
    "arxiv_id": "quant-ph/0501117",
    "authors": [
      "Zhe Sun",
      "XiaoGuang Wang",
      "AnZi Hu",
      "You-Quan Li"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0253-6102/43/6/015",
    "title": "Entanglement in spin-1/2 dimerized Heisenberg systems",
    "url": "https://arxiv.org/abs/quant-ph/0501117"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4d3ccb4a-bb00-4ade-9dff-a9dd30d04bcd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}