{
  "annotation_id": "d213b2e3-4570-4328-a29d-8f46c4e2a00c",
  "date_created": "2026-03-02T18:02:34.549000Z",
  "date_modified": "2026-03-02T18:02:34.549000Z",
  "file_hash": "37021ed3877f7972e25b037135c1396c472fc6e64861aaa6073feba87059c14b",
  "private": false,
  "record": {
    "abstract": "Given a single copy of a mixed state of the form\n\\rho=\\lambda\\rho_1+(1-\\lambda)\\rho_2, what is the optimal measurement to\nestimate the parameter \\lambda, if \\rho_1 and \\rho_2 are known? We present a\ngeneral strategy to obtain the optimal measurements employing a Bayesian\nestimator. The measurements are chosen to minimize the deviation between the\nestimated- and the true value of \\lambda. We explicitly determine the optimal\nmeasurements for a general two-dimensional system and for important higher\ndimensional cases.",
    "arxiv_id": "quant-ph/0702211",
    "authors": [
      "Thomas Konrad",
      "Otfried G\u00fchne",
      "J\u00fcrgen Audretsch",
      "Hans J. Briegel"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.062101",
    "journal_ref": "Phys. Rev. A 75, 062101 (2007)",
    "title": "Parameter estimation for mixed states from a single copy",
    "url": "https://arxiv.org/abs/quant-ph/0702211"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9d77f518-324a-4dae-963d-63fb513128dd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}