{
  "annotation_id": "a74f4331-1c4b-4bb8-97a9-31d7e5320de7",
  "date_created": "2026-03-02T18:00:01.606000Z",
  "date_modified": "2026-03-02T18:00:01.606000Z",
  "file_hash": "c76612436607d5bf5d83ab4a9c5dc01e55459e50e86c23ebc539e5b4adf0b4bd",
  "private": false,
  "record": {
    "abstract": "After recapitulating the eigenvalue problem of the su(1,1)-algebra in the\nconventional form, the same problem is treated in an unconventional form, in\nwhich the eigenvalue is pure imaginary. Further, the coupling scheme of two\nsu(1,1)-spins is discussed in the framework of two possibilities, in which\ncertain new aspects appear. Finally, the coupling scheme developed in this\npaper is applied to a concrete example, which will serve boson realization of\nthe so(4)- and the so(3,1)-algebra presented in the next paper.",
    "arxiv_id": "nucl-th/0411071",
    "authors": [
      "S. Nishiyama",
      "C. Providencia",
      "J da Providencia",
      "Y. Tsue",
      "M. Yamamura"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1143/PTP.113.153",
    "journal_ref": "Prog.Theor.Phys. 113 (2005) 153-168",
    "title": "On the Eigenvalue Problem of the su(1,1)-Algebra and the Coupling Scheme   of Two su(1,1)-Spins",
    "url": "https://arxiv.org/abs/nucl-th/0411071"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5a087942-3886-41c5-8da7-dc1850a2fbac",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}