{
  "annotation_id": "584027b2-cb73-4cb4-aded-92a33f8058d7",
  "date_created": "2026-03-02T18:02:40.783000Z",
  "date_modified": "2026-03-02T18:02:40.783000Z",
  "file_hash": "486ac69f79151bd4146f595e73531e2f60fc3f5b9b30e9ae5454793721869cd7",
  "private": false,
  "record": {
    "abstract": "We study the build up of quantum coherence between two Bose-Einstein\ncondensates which are initially in mixed states. We consider in detail the two\ncases where each condensate is initially in a thermal or a Poisson distribution\nof atom number. Although initially there is no relative phase between the\ncondensates, a sequence of spatial atom detections produces an interference\npattern with arbitrary but fixed relative phase. The visibility of this\ninterference pattern is close to one for the Poisson distribution of two\ncondensates with equal counting rates but it becomes a stochastic variable in\nthe thermal case, where the visibility will vary from run to run around an\naverage visibility of $\\pi /4.$ In both cases, the variance of the phase\ndistribution is inversely proportional to the number of atom detections in the\nregime where this number is large compared to one but small compared with the\ntotal number of atoms in the condensates.",
    "arxiv_id": "quant-ph/9704036",
    "authors": [
      "R. Graham",
      "T. Wong",
      "M. J. Collett",
      "S. M. Tan",
      "D. F. Walls"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.57.493",
    "title": "Phase preparation by atom counting of Bose-Einstein condensates in mixed   states",
    "url": "https://arxiv.org/abs/quant-ph/9704036"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8d0e9fb7-01bc-4d3b-b59d-981a77ffcbd5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}