{
  "annotation_id": "28db4937-01e2-4d34-8123-85325ec4e8d0",
  "date_created": "2026-03-02T18:01:52.290000Z",
  "date_modified": "2026-03-02T18:01:52.290000Z",
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  "record": {
    "abstract": "There are self-adjoint operators which determine both spectral and\nsemispectral measures. These measures have very different commutativity and\ncovariance properties. This fact poses a serious question on the physical\nmeaning of such a self-adjoint operator and its associated operator measures.",
    "arxiv_id": "quant-ph/0206168",
    "authors": [
      "D. A. Dubin",
      "M. A. Hennings",
      "P. Lahti",
      "J. -P. Pellonpaa"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0305-4470/35/43/310",
    "journal_ref": "J. Phys. A: Math. Gen. 35 (2002) 9113-9121",
    "title": "A dilemma in representing observables in quantum mechanics",
    "url": "https://arxiv.org/abs/quant-ph/0206168"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "19f7033a-7afc-4f9f-8e7c-f16c5ed8693b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}