{
  "annotation_id": "ba6e018b-c8e2-4a99-a5a7-a5de4991aec5",
  "date_created": "2026-03-02T18:02:45.023000Z",
  "date_modified": "2026-03-02T18:02:45.023000Z",
  "file_hash": "f21fe36f5626044ed6fef802250e05c64c4f1e0def716559b9986966aa4c5494",
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  "record": {
    "abstract": "A Franson-type test of Bell inequalities by photons 10.9 km apart is\npresented. Energy-time entangled photon-pairs are measured using two-channel\nanalyzers, leading to a violation of the inequalities by 16 standard deviations\nwithout subtracting accidental coincidences. Subtracting them, a 2-photon\ninterference visibility of 95.5% is observed, demonstrating that distances up\nto 10 km have no significant effect on entanglement. This sets quantum\ncryptography with photon pairs as a practical competitor to the schemes based\non weak pulses.",
    "arxiv_id": "quant-ph/9806043",
    "authors": [
      "W. Tittel",
      "J. Brendel",
      "H. Zbinden",
      "N. Gisin"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.81.3563",
    "journal_ref": "Phys.Rev.Lett. 81 (1998) 3563-3566",
    "title": "Violation of Bell inequalities by photons more than 10 km apart",
    "url": "https://arxiv.org/abs/quant-ph/9806043"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d90cd173-44c1-4a55-a256-537121550a43",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}