{
  "annotation_id": "a1da4e30-bd40-4fe0-8abe-eb87c19c57e8",
  "date_created": "2026-03-02T18:02:12.640000Z",
  "date_modified": "2026-03-02T18:02:12.640000Z",
  "file_hash": "3a0d56a9cc23d092b661f89146c328df32b4c1451ae26d6ddc8bb24aa1f58be2",
  "private": false,
  "record": {
    "abstract": "We address the problem of optimal estimation of the relative phase for\ntwo-dimensional quantum systems in mixed states. In particular, we derive the\noptimal measurement procedures for an arbitrary number of qubits prepared in\nthe same mixed state.",
    "arxiv_id": "quant-ph/0411133",
    "authors": [
      "Giacomo Mauro D\u0027Ariano",
      "Chiara Macchiavello",
      "Paolo Perinotti"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.042327",
    "journal_ref": "Phys. Rev. A 72 042327 (2005)",
    "title": "Optimal phase estimation for qubit mixed states",
    "url": "https://arxiv.org/abs/quant-ph/0411133"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "01764b0e-1eae-4824-aef7-84b405e8d290",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}