{
  "annotation_id": "6c5a6a03-f364-46db-8286-5f8b8437ce97",
  "date_created": "2026-03-02T18:01:55.719000Z",
  "date_modified": "2026-03-02T18:01:55.719000Z",
  "file_hash": "ea52996a8c090b2c541466e9c8f4a2c33982f3aa0bb910ffc9615ca496e30876",
  "private": false,
  "record": {
    "abstract": "We study generalized measurements (POVM measurements) on a single d-level\nquantum system which is in a completely unknown pure state, and derive the best\nestimate of the post-measurement state. The mean post-measuremement estimation\nfidelity of a generalized measurement is obtained and related to the operation\nfidelity of the device. This illustrates how the information gain about the\npost-measurement state and the corresponding state disturbance are mutually\ndependent. The connection between the best estimates of the pre- and\npost-measurement state is established and interpreted. For pure generalized\nmeasurements the two states coincide.",
    "arxiv_id": "quant-ph/0210205",
    "authors": [
      "J\u00fcrgen Audretsch",
      "Lajos Di\u00f3si",
      "Thomas Konrad"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.68.034302",
    "journal_ref": "Phys. Rev. A68 (2003) 34302-(4)",
    "title": "Estimating the post-measurement state",
    "url": "https://arxiv.org/abs/quant-ph/0210205"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b5f32569-c9ab-4636-bde5-cfb304f865d9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}