{
  "annotation_id": "47e8fd15-0a9e-4e45-8a27-7b37327eae75",
  "date_created": "2026-03-02T18:01:49.269000Z",
  "date_modified": "2026-03-02T18:01:49.269000Z",
  "file_hash": "d23aa755bcd538a814a0692c08757d872c4c862411a7659b4f85d45b0716dcef",
  "private": false,
  "record": {
    "abstract": "We study the limitations for entanglement due to collisional decoherence in a\nBose-Einstein condensate. Specifically we consider relative number squeezing\nbetween photons and atoms coupled out from a homogeneous condensate. We study\nthe decay of excited quasiparticle modes due to collisions, in condensates of\natoms with one or two internal degrees of freedom. The time evolution of these\nmodes is determined in the linear response approximation to the deviation from\nequilibrium. We use Heisenberg-Langevin equations to derive equations of motion\nfor the densities and higher correlation functions which determine the\nsqueezing. In this way we can show that decoherence due to quasiparticle\ninteractions imposes an important limit on the degree of number squeezing which\nmay be achieved. Our results are also relevant for the determination of\ndecoherence times in other experiments based on entanglement, e.g. the slowing\nand stopping of light in condensed atomic gases using dark states.",
    "arxiv_id": "quant-ph/0202012",
    "authors": [
      "T. Gasenzer"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0953-4075/35/10/312",
    "journal_ref": "J. Phys. B: At. Mol. Opt. Phys. 35: 2337-2356, 2002",
    "title": "Limitations of squeezing due to collisional decoherence in Bose-Einstein   condensates",
    "url": "https://arxiv.org/abs/quant-ph/0202012"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "08dacc73-2e77-46ec-8e06-08d7261b6030",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}