{
  "annotation_id": "ac493cf1-a845-47ad-ae85-66b7e09053a4",
  "date_created": "2026-03-02T18:01:56.346000Z",
  "date_modified": "2026-03-02T18:01:56.346000Z",
  "file_hash": "4655cefdfe2a3b7626e4248ea047f2d745d5faabf9a983423460cc69539900b6",
  "private": false,
  "record": {
    "abstract": "In this paper we address the problem of the arrow of time from a cosmological\npoint of view, rejecting the traditional entropic approach that defines the\nfuture direction of time as the direction of the entropy increase: from our\nperspective, the arrow of time has a global origin and it is an intrinsic,\ngeometrical feature of space-time. Time orientability and existence of a cosmic\ntime are necessary conditions for defining an arrow of time, which is\nmanifested globally as the time-asymmetry of the universe as a whole, and\nlocally as a time-asymmetric energy flux. We also consider arrows of time of\ndifferent origins (quantum, electromagnetic, thermodynamic, etc.) showing that\nthey can be non-conventionally defined only if the geometrical arrow is\npreviously defined.",
    "arxiv_id": "quant-ph/0211162",
    "authors": [
      "Mario Castagnino",
      "Luis Lara",
      "Olimpia Lombardi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0264-9381/20/2/310",
    "journal_ref": "Class.Quant.Grav. 20 (2003) 369-392",
    "title": "The cosmological origin of time-asymmetry",
    "url": "https://arxiv.org/abs/quant-ph/0211162"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "11dafdad-353b-4350-b9c2-c114a0900d67",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}