{
  "annotation_id": "64b783b1-eb69-4875-af47-5dc4bb25f795",
  "date_created": "2026-03-02T18:00:11.532000Z",
  "date_modified": "2026-03-02T18:00:11.532000Z",
  "file_hash": "e5ee30435ddd309dafe8cfc9e199f839049ada179968f15f882e7f78866b083a",
  "private": false,
  "record": {
    "abstract": "The energy shift due to the interaction of two particles in a large box is\nproportional to the free particle scattering phase-shift. This provides an\napproximation to the effective interaction referred to as the phase-shift\napproximation. For a many-body fermion system this effective interaction has to\nbe corrected for the Pauli-blocking. It is used to calculate the energy of a\nspin 1/2 fermion system as a function of the two-body scattering length and\neffective range. In the unitary limit with scattering length going to infinity\nand effective range going to zero the energy is 0.540 (in the units of the\nnon-interactiong fermi gas energy) with a pp-ladder summation. Including\nhh-ladders the energy is 0.570. A smooth crossover from the BCS to the BEC\nregion is observed. Pairing is not included.",
    "arxiv_id": "nucl-th/0701006",
    "authors": [
      "H. S. Kohler"
    ],
    "categories": [
      "nucl-th",
      "astro-ph",
      "cond-mat.other"
    ],
    "title": "Spin 1/2 Fermions in the Unitary Limit",
    "url": "https://arxiv.org/abs/nucl-th/0701006"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5b22b51b-7a57-44b3-8dae-34329fdad846",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}