{
  "annotation_id": "e837aa4a-a27f-4aff-8e97-5848ab2e12c7",
  "date_created": "2026-03-02T18:00:11.716000Z",
  "date_modified": "2026-03-02T18:00:11.716000Z",
  "file_hash": "f1daa8e8267444980ca49fa35a8be93dc9e5f87c37d3ce9fc62a40185161ad7a",
  "private": false,
  "record": {
    "abstract": "We investigate the spatial structure of the two-neutron wave function in the\nBorromean nucleus $^{11}$Li, using a three-body model of $^9$Li $+n+n$, which\nincludes many-body correlations stemming from the Pauli principle. The behavior\nof the neutron pair at different densities is simulated by calculating the\ntwo-neutron wave function at several distances between the core nucleus $^9$Li\nand the center of mass of the two neutrons. With this representation, a strong\nconcentration of the neutron pair on the nuclear surface is for the first time\nquantitatively established for neutron-rich nuclei. That is, the neutron pair\nwave function in $^{11}$Li has an oscillatory behavior at normal density, while\nit becomes a well localized single peak in the dilute density region around the\nnuclear surface. We point out that these features qualitatively correspond to\nthe BCS and BEC-like structures of the pair wave function found in infinite\nnuclear matter.",
    "arxiv_id": "nucl-th/0611064",
    "authors": [
      "K. Hagino",
      "H. Sagawa",
      "J. Carbonell",
      "P. Schuck"
    ],
    "categories": [
      "nucl-th",
      "cond-mat.supr-con",
      "nucl-ex"
    ],
    "doi": "10.1103/PhysRevLett.99.022506",
    "journal_ref": "Phys.Rev.Lett.99:022506,2007",
    "title": "Coexistence of BCS and BEC-like pair structures in halo nuclei",
    "url": "https://arxiv.org/abs/nucl-th/0611064"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "307b161e-5f96-42af-83b9-8dedfeb7e7f7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}