{
  "annotation_id": "567a413c-0715-4a6f-889e-8f1da627c49b",
  "date_created": "2026-03-02T18:02:27.448000Z",
  "date_modified": "2026-03-02T18:02:27.448000Z",
  "file_hash": "154c4a1c4549d04a4283eef06adc080967692f90d9e1d5b86b74f13b4f33dad8",
  "private": false,
  "record": {
    "abstract": "We employ a generalized Dicke model to study theoretically the quantum\ncriticality of an extended two-level atomic ensemble interacting with a\nsingle-mode quantized light field. Effective Hamiltonians are derived and\ndiagonalized to investigate numerically their eigenfrequencies for different\nquantum phases in the system. Based on the analysis of the eigenfrequencies, an\nintriguing quantum-phase transition from a normal phase to a superradiant phase\nis revealed clearly, which is quite different from that observed with a\nstandard Dicke model.",
    "arxiv_id": "quant-ph/0604097",
    "authors": [
      "Yong Li",
      "Z. D. Wang",
      "C. P. Sun"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.74.023815",
    "journal_ref": "Phys. Rev. A 74, 023815 (2006)",
    "title": "Quantum criticality in a generalized Dicke model",
    "url": "https://arxiv.org/abs/quant-ph/0604097"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "7427c2e9-0a7c-486f-8dfb-cc044ff54752",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}