{
  "annotation_id": "cb31cba1-f313-44fa-b2e2-0a26d031c002",
  "date_created": "2026-03-02T18:00:07.757000Z",
  "date_modified": "2026-03-02T18:00:07.757000Z",
  "file_hash": "a4b4a463b3b5ed0ca820fb6bba72673554cab7b3c62836af294d0f60c31f17d6",
  "private": false,
  "record": {
    "abstract": "We analyze spatial structure of the neutron Cooper pair in superfluid\nlow-density uniform matter by means of BCS calculations employing a bare force\nand the effective Gogny interaction. It is shown that the Cooper pair exhibits\na strong spatial di-neutron correlation in a wide range of neutron density\n$\\rho/\\rho_0\\approx 10^{-4}-0.5$. This feature is related to the crossover\nbehavior between the pairing of the weak coupling BCS type and the\nBose-Einstein condensation of bound neutron pairs. We also show that the\nzero-range delta interaction can describe the spatial structure of the neutron\nCooper pair if the density dependent interaction strength and the cut-off\nenergy are appropriately chosen. Parameterizations of the density-dependent\ndelta interaction satisfying this condition are discussed.",
    "arxiv_id": "nucl-th/0512021",
    "authors": [
      "Masayuki Matsuo"
    ],
    "categories": [
      "nucl-th"
    ],
    "doi": "10.1103/PhysRevC.73.044309",
    "journal_ref": "Phys.Rev. C73 (2006) 044309",
    "title": "Spatial structure of neutron Cooper pair in low density uniform matter",
    "url": "https://arxiv.org/abs/nucl-th/0512021"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "13aa7d56-21ac-4b01-a79e-2986659c2c7f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}