{
  "annotation_id": "f5ce9e6e-55c7-4483-9f44-65e4b44e045e",
  "date_created": "2026-03-02T18:02:02.661000Z",
  "date_modified": "2026-03-02T18:02:02.661000Z",
  "file_hash": "561da4f1ea51a1b9393a0b48f5053702ce306abe0be12b25f5c53ad8a6765b51",
  "private": false,
  "record": {
    "abstract": "We analyse the reconstruction of an unknown pure qubit state. We derive the\noptimal guess that can be inferred from any set of measurements on N identical\ncopies of the system with the fidelity as a figure of merit. We study in detail\nthe estimation process with individual von Neumann measurements and demonstrate\nthat they are very competitive as compared to (complicated) collective\nmeasurements. We compute the expressions of the fidelity for large $N$ and show\nthat individual measurement schemes can perform optimally in the asymptotic\nregime.",
    "arxiv_id": "quant-ph/0312167",
    "authors": [
      "E. Bagan",
      "M. Baig",
      "A. Monras",
      "R. Munoz-Tapia"
    ],
    "categories": [
      "quant-ph"
    ],
    "journal_ref": "Proceedings of the 8th ICSSUR, Rinton Press 2003",
    "title": "Optimal reconstruction of a pure qubit state with local measurements",
    "url": "https://arxiv.org/abs/quant-ph/0312167"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "05cfd6c3-79db-486e-91c9-4586a75ed8b7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}