{
  "annotation_id": "64b74f8b-bb52-491f-aecd-b6d1e252d30a",
  "date_created": "2026-03-02T18:00:39.111000Z",
  "date_modified": "2026-03-02T18:00:39.111000Z",
  "file_hash": "63039b08199fafb111c78dbcb68c5496b20c14a3ac53c6d71c4592144e841fa2",
  "private": false,
  "record": {
    "abstract": "Chirality is considered by many scientists to be mainly a geometric concept.\nThere exists also a physical aspect of chirality which is largely being\noverlooked at. Two examples of mechanical devices are introduced here that\nrepresent ``Physical Chirality\u0027\u0027. These are a rotating water sprinkler and a\nvariant of Crookes\u0027 radiometer. When interacting with appropriate media, they\nboth choose only one mode of rotation out of two possible ones. Such a behavior\ndoes not obey time-reversal invariance, which is regarded to be a rule in\nclassical mechanics. This is due to their chiral nature. Instead, they do obey\na space-time (ST) law of invariance, that is, what is rotating in the opposite\ndirection is the mirror-image of the given device. In a recent experiment of\nKoumura et al. they discovered a similar behavior of a molecular rotor. The\npossible biological significance of physical chirality is emphasized hereby,\nand the conclusion is that chiral molecular systems do not reach readily\nthermal equilibrium. In other words: ``Physical chirality does feed on negative\nentropy\u0027\u0027, and therefore, it may well be of crucial value to life.",
    "arxiv_id": "physics/0206074",
    "authors": [
      "G. Gilat"
    ],
    "categories": [
      "physics.bio-ph"
    ],
    "title": "Physical Chirality. It Feeds on Negative Entropy",
    "url": "https://arxiv.org/abs/physics/0206074"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "328de010-e312-441b-9a1c-bb0b6ef18321",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}