{
  "annotation_id": "928ef6c0-21cd-4fbb-b18e-79573ae1e127",
  "date_created": "2026-03-02T18:01:38.513000Z",
  "date_modified": "2026-03-02T18:01:38.513000Z",
  "file_hash": "a09a9d43a19768d7b3b4e8dcb0f7adf7d2a94b46317ae97673c726c83b971bac",
  "private": false,
  "record": {
    "abstract": "Any method for estimating the ensemble average of arbitrary operator\n(observables or not, including the density matrix) relates the quantity of\ninterest to a complete set of observables, i.e. a quorum}. This corresponds to\nan expansion on an irreducible set of operators in the Liouville space. We give\ntwo general characterizations of these sets. All the known unbiased\nreconstruction techniques, i.e. ``quantum tomographies\u0027\u0027, can be described in\nthis framework. New operatorial resolutions are given that can be used to\nimplement novel reconstruction schemes.",
    "arxiv_id": "quant-ph/0006006",
    "authors": [
      "G. Mauro D\u0027Ariano",
      "Lorenzo Maccone",
      "Matteo G. A. Paris"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0305-4470/34/1/307",
    "journal_ref": "J. Phys. A vol 34, 93 (2001).",
    "title": "Quorum of observables for universal quantum estimation",
    "url": "https://arxiv.org/abs/quant-ph/0006006"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "1f51cefd-6793-476f-a002-54ac5e78871d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}