{
  "annotation_id": "2551f395-a82d-4dc7-ab47-ea1b82edf5cf",
  "date_created": "2026-03-02T18:02:23.957000Z",
  "date_modified": "2026-03-02T18:02:23.957000Z",
  "file_hash": "0338acc6f5699c4719a01425cd350b0eb025eedf16541454611a0657ddaf3643",
  "private": false,
  "record": {
    "abstract": "This paper reports the first demonstration of the generation and distribution\nof entangled photon pairs in the 1.5-um band using spontaneous four-wave mixing\nin a cooled fiber. Noise photons induced by spontaneous Raman scattering were\nsuppressed by cooling a dispersion shifted fiber with liquid nitrogen, which\nresulted in a significant improvement in the visibility of two-photon\ninterference. By using this scheme, time-bin entangled qubits were successfully\ndistributed over 60 km of optical fiber with a visibility of 76%, which was\nobtained without removing accidental coincidences.",
    "arxiv_id": "quant-ph/0512163",
    "authors": [
      "Hiroki Takesue"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1364/OE.14.003453",
    "journal_ref": "Opt. Express 14, 3453 (2006).",
    "title": "Long-distance distribution of time-bin entanglement generated in a   cooled fiber",
    "url": "https://arxiv.org/abs/quant-ph/0512163"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b8864d44-9dec-4d56-bb71-603783ef51d4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}