{
  "id": "cond-mat/0207290",
  "version": "v3",
  "published": "2002-07-11T13:20:36.000Z",
  "updated": "2003-03-06T11:12:29.000Z",
  "title": "Quantum Chaos Triggered by Precursors of a Quantum Phase Transition: The Dicke Model",
  "authors": [
    "C. Emary",
    "T. Brandes"
  ],
  "comment": "4 pages, 5 figures, minor changes, Journal ref. added",
  "journal": "Phys.Rev.Lett.90:044101,2003",
  "doi": "10.1103/PhysRevLett.90.044101",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.dis-nn",
    "quant-ph"
  ],
  "abstract": "We consider the Dicke Hamiltonian, a simple quantum-optical model which exhibits a zero-temperature quantum phase transition. We present numerical results demonstrating that at this transition the system changes from being quasi-integrable to quantum chaotic. By deriving an exact solution in the thermodynamic limit we relate this phenomenon to a localisation-delocalisation transition in which a macroscopic superposition is generated. We also describe the classical analogues of this behaviour.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2003-03-06T11:12:29.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.43.Nq",
      "42.50.Fx",
      "05.45.Mt"
    ],
    "keywords": [
      "quantum chaos",
      "dicke model",
      "precursors",
      "zero-temperature quantum phase transition",
      "system changes"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 808227
    }
  }
}