{
  "annotation_id": "d5222141-0f97-44eb-b02a-f6aace35417d",
  "date_created": "2026-03-02T18:01:10.749000Z",
  "date_modified": "2026-03-02T18:01:10.749000Z",
  "file_hash": "7ad26f9b15734902e8896dcbf894d9d6e5083c087d5140b62130128c7e2f1c57",
  "private": false,
  "record": {
    "abstract": "Mechanical Maxwell\u0027s demons, such as Smoluchowski\u0027s trapdoor and Feynman\u0027s\nratchet and pawl need external energy source to operate. If you cease to feed a\ndemon the Second Law of thermodynamics will quickly stop its operation.\nNevertheless, if the parity is an unbroken symmetry of nature, it may happen\nthat a small modification leads to demons which do not need feeding. Such\ndemons can act like perpetuum mobiles of the second kind: extract heat energy\nfrom only one reservoir, use it to do work and be isolated from the rest of\nordinary world. Yet the Second Law is not violated because the demons pay their\nentropy cost in the hidden (mirror) sector of the world by emitting mirror\nphotons.",
    "arxiv_id": "physics/0608114",
    "authors": [
      "Z. K. Silagadze"
    ],
    "categories": [
      "physics.class-ph",
      "cond-mat.stat-mech",
      "physics.gen-ph"
    ],
    "journal_ref": "ActaPhys.Polon.B38:101-126,2007",
    "title": "Maxwell\u0027s demon through the looking glass",
    "url": "https://arxiv.org/abs/physics/0608114"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "57b1fd2d-45bc-445a-88a3-0fd61c7df480",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}