{
  "annotation_id": "a7c1e087-5af6-4f73-b6dd-c74a01f32aff",
  "date_created": "2026-03-02T18:02:03.603000Z",
  "date_modified": "2026-03-02T18:02:03.603000Z",
  "file_hash": "f813e7144b677379edd46cde6d24fc211921f68b37827a6ce4a0b62953a71a80",
  "private": false,
  "record": {
    "abstract": "A conditioned unitary transformation ($90^o$ polarization rotation) is\nperformed at single-photon level. The transformation is realized by rotating\npolarization for one of the photons of a polarization-entangled biphoton state\n(signal photon) by means of a Pockel\u0027s cell triggered by the detection of the\nother (idler) photon after polarization selection. As a result, polarization\ndegree for the signal beam changes from zero to the value given by the idler\ndetector quantum efficiency. This result is relevant to practical realization\nof various quantum information schemes and can be used for developing a new\nmethod of absolute quantum efficiency calibration.",
    "arxiv_id": "quant-ph/0312211",
    "authors": [
      "G. Brida",
      "M. Chekhova",
      "M. Genovese",
      "M. Gramegna",
      "L. Krivitsky",
      "S. Kulik"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.70.032332",
    "journal_ref": "Phys. Rev. A 70 (2004) 032332",
    "title": "Conditioned Unitary Transformation on biphotons",
    "url": "https://arxiv.org/abs/quant-ph/0312211"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "c4b4cbd6-a26f-4424-8344-1b59044875cd",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}