{
  "annotation_id": "7035de7a-cc24-4c31-8309-0cb229dd5ac8",
  "date_created": "2026-03-02T18:02:27.288000Z",
  "date_modified": "2026-03-02T18:02:27.288000Z",
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  "record": {
    "abstract": "The master equation of quantum optical density operator is transformed to the\nequation of characteristic function. The parametric amplification and amplitude\ndamping as well as the phase damping are considered. The solution for the most\ngeneral initial quantum state is obtained for parametric amplification and\namplitude damping. The purity of one mode Gaussian system and the entanglement\nof two mode Gaussian system are studied.",
    "arxiv_id": "quant-ph/0604208",
    "authors": [
      "Xiao-yu Chen"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0953-4075/39/22/005",
    "journal_ref": "J. Phys. B: At. Mol. Opt. Phys. 39 (2006)4605-4615",
    "title": "The characteristic function of optical evolution",
    "url": "https://arxiv.org/abs/quant-ph/0604208"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "713bdf75-1955-4343-a353-36f1ffbf9dc2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}