{
  "annotation_id": "bf8c7b15-bd88-4a82-897a-7c9ac60dc7cd",
  "date_created": "2026-03-02T18:02:23.726000Z",
  "date_modified": "2026-03-02T18:02:23.726000Z",
  "file_hash": "9999076f96f53ead0de2b05f89752ab64d9decef5ed82a1770397d60d692e46c",
  "private": false,
  "record": {
    "abstract": "In the paper the Bayesian and the least squares methods of quantum state\ntomography are compared for a single qubit. The quality of the estimates are\ncompared by computer simulation when the true state is either mixed or pure.\nThe fidelity and the Hilbert-Schmidt distance are used to quantify the error.\n  It was found that in the regime of low measurement number the Bayesian method\noutperforms the least squares estimation. Both methods are quite sensitive to\nthe degree of mixedness of the state to be estimated, that is, their\nperformance can be quite bad near pure states.",
    "arxiv_id": "quant-ph/0511263",
    "authors": [
      "Th. Baier",
      "K. M. Hangos",
      "A. Magyar",
      "D. Petz"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Comparison of some methods of quantum state estimation",
    "url": "https://arxiv.org/abs/quant-ph/0511263"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4dee51da-136e-489e-96b3-44750d993ec6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}