{
  "annotation_id": "6465a642-1e9f-4424-be45-695eb714f794",
  "date_created": "2026-03-02T18:02:44.142000Z",
  "date_modified": "2026-03-02T18:02:44.142000Z",
  "file_hash": "87f1489616f53044aa1a2f99c94761eddfa6a581f80a2f5c47cb665deafb3477",
  "private": false,
  "record": {
    "abstract": "We present a theoretical study of the ground state of a Bose-Einstein\ncondensate with repulsive inter-particle interactions in a double-well\npotential, using a restricted variational principle. Within such an approach,\nthere is a transition from a single condensate to a fragmented condensate as\nthe strength of the central barrier of the potential is increased. We determine\nthe nature of this transition through approximate analytic as well as numerical\nsolutions of our model in the regime where the inter-particle interactions can\nbe treated perturbatively. The degree of fragmentation of the condensate is\ncharacterized by the degrees of first-order and second-order spatial coherence\nacross the barrier.",
    "arxiv_id": "quant-ph/9810094",
    "authors": [
      "R. W. Spekkens",
      "J. E. Sipe"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.59.3868",
    "journal_ref": "Phys. Rev. A 59, 3868 (1999)",
    "title": "Spatial fragmentation of a Bose-Einstein condensate in a double-well   potential",
    "url": "https://arxiv.org/abs/quant-ph/9810094"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c9c4b32a-409e-4ba3-bddc-5df6cf947231",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}