{
  "annotation_id": "a9f97b87-5e40-40ea-b453-0def0dd978b4",
  "date_created": "2026-03-02T18:02:03.189000Z",
  "date_modified": "2026-03-02T18:02:03.189000Z",
  "file_hash": "6ce61cb27f6f1a1affe57ab7a767a0b8b0aab4be721a3156a64ed48156a6e7c7",
  "private": false,
  "record": {
    "abstract": "We use a Heisenberg spin-1/2 chain to investigate how chaos and localization\nmay affect the entanglement of pairs of qubits. To measure how much entangled a\npair is, we compute its concurrence, which is then analyzed in the\ndelocalized/localized and in the chaotic/non-chaotic regimes. Our results\nindicate that chaos reduces entanglement and that entanglement decreases in the\nregion of strong localization. In the transition region from a chaotic to a\nnon-chaotic regime localization increases entanglement. We also show that\nentanglement is larger for strongly interacting qubits (nearest neighbors) than\nfor weakly interacting qubits (next and next-next neighbors).",
    "arxiv_id": "quant-ph/0310177",
    "authors": [
      "L. F. Santos",
      "G. Rigolin",
      "C. O. Escobar"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.042304",
    "journal_ref": "Phys. Rev. A 69, 042304 (2004)",
    "title": "Entanglement versus chaos in disordered spin chains",
    "url": "https://arxiv.org/abs/quant-ph/0310177"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "51f34232-f215-4326-9f9b-67f75b7c718e",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}