{
  "annotation_id": "b9f9878f-ab7c-4822-bf21-bef0593012bc",
  "date_created": "2026-03-02T18:02:48.530000Z",
  "date_modified": "2026-03-02T18:02:48.530000Z",
  "file_hash": "b12c46cdedb9b4689adc9f824fd543c532b50ce8971778eb5014b2888ea5ab36",
  "private": false,
  "record": {
    "abstract": "We discuss the transition from a quantum to a classical domain for a model\nwhere a separation into environment and system is explicitely not given.\nUtilizing the coarse graining procedure for free quantum fields we also apply\nthe projection method and the Hamiltonian principle to study possible cases of\nemergent classicality. General conditions for classical dynamics are given.\nEventually, they lead to the equations of motion for a perfect classical fluid.",
    "arxiv_id": "quant-ph/9905014",
    "authors": [
      "A. M. Lisewski"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "On the classical hydrodynamic limit of quantum field theories",
    "url": "https://arxiv.org/abs/quant-ph/9905014"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0d1236df-3f50-4e64-bb22-0ab2e2341d8c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}