{
  "annotation_id": "0a389c9b-940c-418e-bf5f-336e1fa93b79",
  "date_created": "2026-03-02T18:00:08.370000Z",
  "date_modified": "2026-03-02T18:00:08.370000Z",
  "file_hash": "ac37079beab46d62f2d14a1daa7b4a846257fe8066f7d554999505adcb03d61a",
  "private": false,
  "record": {
    "abstract": "Following the idea, recently, proposed by the present authors for the\ntwo-level pairing model, the Lipkin model is reexamined. It is a natural\ngeneralization of the method already developed by the present authors with\nKuriyama. This model is a schematic model for many-fermion system and obeys the\nsu(2)-algebra. It is shown that the use of the Schwinger boson representation,\nthe model is expressed in terms of the su(1,1) times su(1,1)-algebra and with\nthe aid of the MYT mapping method, it is disguised from the orginal form in\nterms of the Holstein-Primakoff representation. Further, under various coherent\nstates, the classical counterparts are derived. It is concluded that the Lipkin\nmodel can be treated in the common ring as that of the two-level pairing model.",
    "arxiv_id": "nucl-th/0604023",
    "authors": [
      "C. Providencia",
      "J. da Providencia",
      "Y. Tsue",
      "M. Yamamura"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1143/PTP.116.87",
    "title": "The Lipkin Model in Many-Fermion System as an Example of the su(1,1)   times su(1,1)-Algebraic Model",
    "url": "https://arxiv.org/abs/nucl-th/0604023"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0c973861-2b7f-4021-9437-66205da520b2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}