{
  "annotation_id": "de830952-6704-42ca-886a-66fdf896c13b",
  "date_created": "2026-03-02T18:02:13.760000Z",
  "date_modified": "2026-03-02T18:02:13.760000Z",
  "file_hash": "bd4383fc2b84f057191c68f1cb3114457a04f22ec21f8ddb3ef86920096c10b0",
  "private": false,
  "record": {
    "abstract": "We study the correlation function and concurrence for the eigenstates with\nzero spin of engineered Heisenberg models to explore the entanglement property.\nIt is shown that the total nearest neighbor (NN) correlation function of\nzero-spin eigenstates reaches its local extremum when the coupling strength is\nuniform, and correspondingly the groundstate entanglement of $d$-D cubic AF\nHeisenberg model is locally maximized. Moreover, numerical calculations for a\n$N$-site quantum spin ring with cosinusoidally modulated exchange coupling,\ni.e. $J_i=J(1+\\cos(2\\pi i/N))$, indicate that the uniform coupling is not the\nunique optimal distribution for maximizing the groundstate entanglement and\nthis modulation of interactions can induce the longer range entanglement.",
    "arxiv_id": "quant-ph/0411177",
    "authors": [
      "R. Xin",
      "Z. Song",
      "C. P. Sun"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.str-el"
    ],
    "doi": "10.1016/j.physleta.2005.05.007",
    "journal_ref": "Phys.Lett. A 342 30 (2005)",
    "title": "Engineering antiferromagnetic Heisenberg spin chains for maximizing of   the groundstate entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0411177"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "902c0c19-f445-4270-bc42-e8f77cbaa9ec",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}