{
  "annotation_id": "a746c6e8-bbfa-4358-ac99-795924075f5c",
  "date_created": "2026-03-02T18:01:49.386000Z",
  "date_modified": "2026-03-02T18:01:49.386000Z",
  "file_hash": "dd5500ffdca83617007b8108e0a4c804d6315c1987edfdf33fff2633c1f99a67",
  "private": false,
  "record": {
    "abstract": "Unsharp spin observables are shown to arise from the fact that a residual\nuncertainty about the actual alignment of the measurement device remains. If\nthe uncertainty is below a certain level, and if the distribution misalignments\nis covariant under rotations, a Kochen-Specker theorem for the unsharp spin\nobservables follows: There are finite sets of directions such that not all the\nunsharp spin observables in these directions can consistently be assigned\napproximate truth-values in a non-contextual way.",
    "arxiv_id": "quant-ph/0203103",
    "authors": [
      "Thomas Breuer"
    ],
    "categories": [
      "quant-ph"
    ],
    "journal_ref": "pp. 195-203 in T.Placek and J. Butterfield (eds.): Non-locality\n  and Modality, NATO Science Series, Kluwer Academic Publishers, Dordrecht,\n  2002",
    "title": "A Kochen-Specker Theorem for Unsharp Spin 1 Observables",
    "url": "https://arxiv.org/abs/quant-ph/0203103"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a619bf27-676b-4995-9de6-3ca72bca8d3f",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}