{
  "id": "nucl-th/0309004",
  "version": "v1",
  "published": "2003-09-02T06:37:43.000Z",
  "updated": "2003-09-02T06:37:43.000Z",
  "title": "Quantum Phase Transitions in the Interacting Boson Model: Integrability, level repulsion and level crossing",
  "authors": [
    "J. M. Arias",
    "J. Dukelsky",
    "J. E. Garcia-Ramos"
  ],
  "comment": "Accepted in PRL",
  "journal": "Phys.Rev.Lett. 91 (2003) 162502",
  "doi": "10.1103/PhysRevLett.91.162502",
  "categories": [
    "nucl-th",
    "cond-mat",
    "quant-ph"
  ],
  "abstract": "We study the quantum phase transition mechanisms that arise in the Interacting Boson Model. We show that the second-order nature of the phase transition from U(5) to O(6) may be attributed to quantum integrability, whereas all the first-order phase transitions of the model are due to level repulsion with one singular point of level crossing. We propose a model Hamiltonian with a true first-order phase transition for finite systems due to level crossings.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-09-02T06:37:43.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "interacting boson model",
      "level crossing",
      "level repulsion",
      "integrability",
      "quantum phase transition mechanisms"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 627095
    }
  }
}