{
  "annotation_id": "c4284cbe-243a-4468-b67f-c15d1d5ffedd",
  "date_created": "2026-03-02T18:02:27.238000Z",
  "date_modified": "2026-03-02T18:02:27.238000Z",
  "file_hash": "7145e206e4fd465572e47c7c7594aa83c0a48bb141823e2d2801c93050104367",
  "private": false,
  "record": {
    "abstract": "We determine thermal entanglement in mean field clusters of $N$ spin one-half\nparticles interacting via the anisotropic Heisenberg interaction, with and\nwithout external magnetic field. For the $xxx$ cluster in the absence of\nmagnetic field we prove that only the N=2 ferromagnetic cluster shows\nentanglement. An external magnetic field $B$ can only entangle $xxx$\nanti-ferromagnetic clusters in certain regions of the $B-T$ plane. On the other\nhand, the $xxz$ clusters of size $N\u003e2$ are entangled only when the interaction\nis ferromagnetic. Detailed dependence of the entanglement on various parameters\nis investigated in each case.",
    "arxiv_id": "quant-ph/0604031",
    "authors": [
      "M. Asoudeh",
      "V. Karimipour"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.73.062109",
    "journal_ref": "Physical Review A 73, 062109 (2006)",
    "title": "Thermal entanglement of spins in mean-field clusters",
    "url": "https://arxiv.org/abs/quant-ph/0604031"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a75e691d-b168-4dbc-8879-a5e95c2e47c4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}