{
  "annotation_id": "b0e2dd38-82d4-49c5-b796-8acb7d1b5e68",
  "date_created": "2026-03-02T18:02:23.783000Z",
  "date_modified": "2026-03-02T18:02:23.783000Z",
  "file_hash": "1aaabc5a9ba324f7be9c82007117c3bf672f1223327be1ab09ff15e10b6152a4",
  "private": false,
  "record": {
    "abstract": "Here we propose an implementation of all possible Positive Operator Value\nMeasures (POVMs) of two-photon polarization states. POVMs are the most general\nclass of quantum measurements. Our setup requires linear optics, Bell State\nmeasurements and an entangled three-photon ancilla state, which can be prepared\nseparately and in advance (or \u0027off-line\u0027). As an example we give the detailed\nsettings for a simultaneous measurement of all four Bell States for an\narbitrary two-photon polarization state, which is impossible with linear optics\nalone.",
    "arxiv_id": "quant-ph/0512227",
    "authors": [
      "S. E. Ahnert",
      "M. C. Payne"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.73.022333",
    "journal_ref": "Phys. Rev. A 73, 022333 (2006)",
    "title": "All possible bipartite positive-operator-value measurements of   two-photon polarization states",
    "url": "https://arxiv.org/abs/quant-ph/0512227"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ab9b67da-b00f-41ee-aa2f-54a2600248c3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}