{
  "annotation_id": "3a19a3c4-e1e6-4759-a4ad-d3fc6cf3afe7",
  "date_created": "2026-03-02T18:02:20.701000Z",
  "date_modified": "2026-03-02T18:02:20.701000Z",
  "file_hash": "1748500005f2509c65e7bfcbb70f6a8e94a8b86c75feb0b7cb9f2b440c14a986",
  "private": false,
  "record": {
    "abstract": "Ground state instabilities of the spin-boson model is studied in this work.\nThe existence of sequential ground state instabilities is shown analytically\nfor arbitrary detuning in the two-spin system. In this model, extra\ndiscontinuities of concurrence(entanglement measure) are found in the finite\nsystem, which do not appear in the on-resonant model. The above results remain\nintact by including extra boson modes. Moreover, by including extra modes, it\nis found that ground state entanglement can be obtained and enhanced even in\nthe weak coupling regime.",
    "arxiv_id": "quant-ph/0510071",
    "authors": [
      "Ru-Fen Liu",
      "Chia-Chu Chen"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/j.physa.2006.08.063",
    "journal_ref": "Physica A, 374, p631-645 (2007)",
    "title": "Ground State Instabilities and Entanglement in the Detuned Dicke Model",
    "url": "https://arxiv.org/abs/quant-ph/0510071"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "694dd8be-d68e-4e30-822c-ac9cb2ad0c33",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}