{
  "annotation_id": "b4dd2e35-c22a-4323-995c-2b9855f532b2",
  "date_created": "2026-03-02T18:01:52.095000Z",
  "date_modified": "2026-03-02T18:01:52.095000Z",
  "file_hash": "d4da75c9ad8c2b9ab1537e0ff1f52a2571694c7b9051ccfef1da3caedc0fb211",
  "private": false,
  "record": {
    "abstract": "We present the experimental results of measurements of the overlap of both\npure and mixed polarization states of photons. The fidelity and purity of mixed\nstates were also measured. The experimental apparatus exploits the fact that a\nbeam splitter can distinguish the singlet Bell state from the other Bell\nstates, i.e., it realizes projections into the symmetric and antisymmetric\nsubspaces of photons\u0027 Hilbert space.",
    "arxiv_id": "quant-ph/0208091",
    "authors": [
      "Martin Hendrych",
      "Miloslav Dusek",
      "Radim Filip",
      "Jaromir Fiurasek"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1016/S0375-9601(03)00262-7",
    "journal_ref": "Phys. Lett. A 310, 95 (2003).",
    "title": "Simple optical measurement of the overlap and fidelity of quantum   states: An experiment",
    "url": "https://arxiv.org/abs/quant-ph/0208091"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4fe87a93-6920-4553-8244-f9b992a68510",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}