{
  "annotation_id": "6925dfa0-7cfc-4957-b1cf-167a6057db61",
  "date_created": "2026-03-02T18:01:52.225000Z",
  "date_modified": "2026-03-02T18:01:52.225000Z",
  "file_hash": "5ea6dccd86298f2917eee9863bca09b782f0e37b5d87b3e3fc55878bdf1604eb",
  "private": false,
  "record": {
    "abstract": "We present detailed instructions for constructing and operating an apparatus\nto produce and detect polarization-entangled photons. The source operates by\ntype-I spontaneous parametric downconversion in a two-crystal geometry. Photons\nare detected in coincidence by single-photon counting modules and show strong\nangular and polarization correlations. We observe more than 100 entangled\nphoton pairs per second. A test of a Bell inequality can be performed in an\nafternoon.",
    "arxiv_id": "quant-ph/0205172",
    "authors": [
      "Dietrich Dehlinger",
      "M. W. Mitchell"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1119/1.1498859",
    "title": "Entangled photon apparatus for the undergraduate laboratory",
    "url": "https://arxiv.org/abs/quant-ph/0205172"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "39b7543f-2022-44a1-980f-1faacebaa529",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}