{
  "annotation_id": "216279b9-4021-4df2-8c7e-4e86b5fb37c4",
  "date_created": "2026-03-02T18:02:44.976000Z",
  "date_modified": "2026-03-02T18:02:44.976000Z",
  "file_hash": "94986e0d15577b8ae2df4613b135819f2ae2ddc79a59d0235150eb745b71554d",
  "private": false,
  "record": {
    "abstract": "The problem of estimating a generic phase-shift experienced by a quantum\nstate is addressed for a generally degenerate phase shift operator. The optimal\npositive operator-valued measure is derived along with the optimal input state.\nTwo relevant examples are analyzed: i) a multi-mode phase shift operator for\nmultipath interferometry; ii) the two mode heterodyne phase detection.",
    "arxiv_id": "quant-ph/9812034",
    "authors": [
      "G. M. D\u0027Ariano",
      "C. Macchiavello",
      "M. F. Sacchi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/S0375-9601(98)00702-6",
    "journal_ref": "Phys.Lett. A248 (1998) 103",
    "title": "On the general problem of quantum phase estimation",
    "url": "https://arxiv.org/abs/quant-ph/9812034"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "70ea1482-fa23-4ee1-9c76-e3e850ad87e7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}