{
  "annotation_id": "9c503d97-50c4-44be-8f6f-7a9c76647efb",
  "date_created": "2026-03-02T18:01:49.440000Z",
  "date_modified": "2026-03-02T18:01:49.440000Z",
  "file_hash": "6a080f34dd1f15037467cf933fa9e2520a7f169f4492818081b04b1f53fd50be",
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  "record": {
    "abstract": "An approach to the description of subdynamics inside non-relativistic quantum\nfield theory is presented, in which the notions of relevant observable, time\nscale and complete positivity of the time evolution are stressed. A scattering\ntheory derivation of the subdynamics of a microsystem interacting through\ncollisions with a macrosystem is given, leading to a master-equation expressed\nin terms of the operator-valued dynamic structure factor, a two-point\ncorrelation function which compactly takes the statistical mechanics properties\nof the macrosystem into account. For the case of a free quantum gas the dynamic\nstructure factor can be exactly calculated and in the long wavelength limit a\nFokker-Planck equation for the description of quantum dissipation and in\nparticular quantum Brownian motion is obtained, where peculiar corrections due\nto quantum statistics can be put into evidence.",
    "arxiv_id": "quant-ph/0204091",
    "authors": [
      "Ludovico Lanz",
      "Bassano Vacchini"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1142/S0217751X02005918",
    "journal_ref": "Int.J.Mod.Phys. A17 (2002) 435-463",
    "title": "Subdynamics of relevant observables: a field theoretical approach",
    "url": "https://arxiv.org/abs/quant-ph/0204091"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "09fe870f-27d1-4316-a74c-57a869433780",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}