{
  "annotation_id": "3a5aa859-102c-4489-a784-cba495b5b694",
  "date_created": "2026-03-02T18:02:02.738000Z",
  "date_modified": "2026-03-02T18:02:02.738000Z",
  "file_hash": "038de64e11cbf7dc4d401ad609e4d71789fa3d4315c7b4b4172bb452bc5ac8a5",
  "private": false,
  "record": {
    "abstract": "It is shown that \u0027non-quantum systems\u0027, with anomalous statistical\nproperties, would carry a distinctive experimental signature. Such systems can\nexist in deterministic hidden-variables theories (such as the pilot-wave theory\nof de Broglie and Bohm). The signature consists of non-additive expectations\nfor non-commuting observables, breaking the sinusoidal modulation of quantum\nprobabilities for two-state systems. This effect is independent of the quantum\nstate (pure or mixed), or of the details of the hidden-variables model.\nExperiments are proposed, testing polarisation probabilities for single\nphotons.",
    "arxiv_id": "quant-ph/0309107",
    "authors": [
      "Antony Valentini"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/j.physleta.2004.10.002",
    "journal_ref": "Phys. Lett. A 332 (2004) 187--193",
    "title": "Universal Signature of Non-Quantum Systems",
    "url": "https://arxiv.org/abs/quant-ph/0309107"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ad7d05de-f326-4e35-8bba-56189ff32ada",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}