{
  "annotation_id": "f6710f42-99af-4ab0-a14c-cb931781a7d4",
  "date_created": "2026-03-02T18:00:12.078000Z",
  "date_modified": "2026-03-02T18:00:12.078000Z",
  "file_hash": "b7ffa3120d4d63e499d2007e6ca614bd0eaf32e1fac9dbfcde52eff61eca633e",
  "private": false,
  "record": {
    "abstract": "An exact boson mapping of the reduced BCS (equal strength) pairing\nHamiltonian is considered. In the mapping, fermion pair operators are mapped\nexactly to the corresponding bosons. The image of the mapping results in a\nBose-Hubbard model with level dependent hopping. Though the resultant\nBose-Hubbard Hamiltonian is non-Hermitian, all eigenvalues are real when Uk/t\u003c\n1, where k is the total number of bosons. When U/t=1, a part of spectrum of the\nBose-Hubbard Hamiltonian corresponds exactly to the whole spectrum of the\nreduced BCS pairing Hamiltonian.",
    "arxiv_id": "nucl-th/0703007",
    "authors": [
      "Feng Pan",
      "J. P. Draayer"
    ],
    "categories": [
      "nucl-th",
      "cond-mat.str-el"
    ],
    "title": "Exact boson mapping of the reduced BCS pairing Hamiltonian",
    "url": "https://arxiv.org/abs/nucl-th/0703007"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b8cd85a7-6a96-4b63-a7d4-d7dcd7e41818",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}