{
  "annotation_id": "4ad06937-d1fb-4523-88e9-fd49556a9356",
  "date_created": "2026-03-02T18:00:36.123000Z",
  "date_modified": "2026-03-02T18:00:36.123000Z",
  "file_hash": "ff5a6976c8da0fef1a14f401c0216063d145a6436d967a9494b8e3d48d87f7d6",
  "private": false,
  "record": {
    "abstract": "We perform detailed close-coupling calculations for the rubidium isotopes\n85Rb and 87Rb to ascertain the nature of their spinor Bose-Einstein\ncondensates. These calculations predict that the spinor condensate for the\nspin-1 boson 87Rb has a ferromagnetic nature. The spinor condensates for the\nspin-2 bosons 85Rb and 87Rb, however, are both predicted to be polar. The\nnature of a spin-1 condensate hinges critically on the sign of the difference\nbetween the s-wave scattering lengths for total spin 0 and 2 while the nature\nof a spin-2 condensate depends on the values of the differences between s-wave\nscattering lengths for the total spin 0, 2 and 4. These scattering lengths were\nextracted previously and found to have overlapping uncertainties for all three\ncases, thus leaving the nature of the spinor condensates ambiguous. The present\nstudy exploits a refined uncertainty analysis of the scattering lengths based\non recently improved result from experimental work by Roberts et al., which\npermits us to extract an unambiguous result for the nature of the ground state\nspinor condensates.",
    "arxiv_id": "physics/0104013",
    "authors": [
      "N. N. Klausen",
      "J. L. Bohn",
      "Chris H. Greene"
    ],
    "categories": [
      "physics.atom-ph"
    ],
    "doi": "10.1103/PhysRevA.64.053602",
    "title": "On the nature of spinor Bose-Einstein condensates in rubidium",
    "url": "https://arxiv.org/abs/physics/0104013"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "231b37af-10cb-4182-9157-1637c893da53",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}