{
  "annotation_id": "40999f9a-798e-469f-ace1-3dbc16a3618e",
  "date_created": "2026-03-02T18:02:06.144000Z",
  "date_modified": "2026-03-02T18:02:06.144000Z",
  "file_hash": "73d8acca1195e2ac5b1d4979d4326adf70bdd6f738cd3150cf6a753caa9a18d9",
  "private": false,
  "record": {
    "abstract": "We investigate the entanglement properties of an ensemble of atoms\ninteracting with a single bosonic field mode via the Dicke (superradiance)\nHamiltonian. The model exhibits a quantum phase transition and a\nwell-understood thermodynamic limit, allowing the identification of both\nquantum and semi-classical many-body features in the behaviour of the\nentanglement. We consider the entanglement between the atoms and the field, an\ninvestigation initiated in [N. Lambert, C. Emary and T. Brandes, Phys. Rev.\nLett. {\\bf 92}, %073602 (2004)]. In the thermodynamic limit, we give exact\nresults for all entanglement partitions and observe a logarithmic divergence of\nthe atom-field entanglement, and discontinuities in the average linear entropy.",
    "arxiv_id": "quant-ph/0405109",
    "authors": [
      "N. Lambert",
      "C. Emary",
      "T. Brandes"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.71.053804",
    "journal_ref": "Phys. Rev. A 71, 053804 (2005)",
    "title": "Entanglement and Entropy in a Spin-Boson Quantum Phase Transition",
    "url": "https://arxiv.org/abs/quant-ph/0405109"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "44e6f65b-7034-49ad-a72e-1686732ad82b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}