{
  "annotation_id": "fb0fe49f-ddcc-4c61-9bdf-7c11aa0e8c7a",
  "date_created": "2026-03-02T18:02:27.393000Z",
  "date_modified": "2026-03-02T18:02:27.393000Z",
  "file_hash": "cd230442e239701b9c03fdfbe64f5e73647c52f3150eb95d8f8c476237047f74",
  "private": false,
  "record": {
    "abstract": "We study the formation of a quasi-condensate in a nearly one dimensional,\nweakly interacting trapped atomic Bose gas. We show that a Hartree Fock\n(mean-field) approach fails to explain the presence of the quasi-condensate in\nthe center of the cloud: the quasi-condensate appears through an\ninteraction-driven cross-over and not a saturation of the excited states.\nNumerical calculations based on Bogoliubov theory give an estimate of the\ncross-over density in agreement with experimental results.",
    "arxiv_id": "quant-ph/0606247",
    "authors": [
      "Jean-Baptiste Trebbia",
      "J\u00e9r\u00f4me Est\u00e8ve",
      "Christoph I. Westbrook",
      "Isabelle Bouchoule"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.stat-mech"
    ],
    "doi": "10.1103/PhysRevLett.97.250403",
    "journal_ref": "Phys. Rev. Lett. 97 (22/12/2006) 250403",
    "title": "Experimental evidence for the breakdown of a Hartree-Fock approach in a   weakly interacting Bose gas",
    "url": "https://arxiv.org/abs/quant-ph/0606247"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "fae0eb6a-da2a-4a58-bbb3-e7101b5c7a25",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}