{
  "annotation_id": "66f54a38-f505-47d5-810c-61b3920f78c0",
  "date_created": "2026-03-02T18:02:27.500000Z",
  "date_modified": "2026-03-02T18:02:27.500000Z",
  "file_hash": "fcc2e8e5d1ed89a04689f7a6ac0e4d487d55cc0f353a5d069bdf185128775df3",
  "private": false,
  "record": {
    "abstract": "Two results are proved at the quantal level in Sorkin\u0027s hierarchy of measure\ntheories. One is a strengthening of an existing bound on the correlations in\nthe EPR-Bohm setup under the assumption that the probabilities admit a strongly\npositive joint quantal measure. It is also proved that any set of no-signalling\nprobabilities, for two distant experimenters with a choice of two alternative\nexperiments each and two possible outcomes per experiment, admits a joint\nquantal measure, though one that is not necessarily strongly positive.",
    "arxiv_id": "quant-ph/0605253",
    "authors": [
      "Matthew Barnett",
      "Fay Dowker",
      "David Rideout"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1751-8113/40/26/011",
    "journal_ref": "J. Phys. A: Math. Theor. 40 (2007) 7255-7264",
    "title": "Popescu-Rohrlich Boxes in Quantum Measure Theory",
    "url": "https://arxiv.org/abs/quant-ph/0605253"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "361e6ff3-3f85-41e6-ba48-4f34cdfc3b27",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}