{
  "annotation_id": "2ab2d54e-b435-4976-a8db-a02b4b97bcd1",
  "date_created": "2026-03-02T18:02:13.805000Z",
  "date_modified": "2026-03-02T18:02:13.805000Z",
  "file_hash": "4e1fe5956bcb3e36d1464c3e6931c0065d7b3a345bf88de91ff2d85aca2305cc",
  "private": false,
  "record": {
    "abstract": "We report the first demonstration of quantum key distribution over a standard\ntelecom fiber exceeding 100 km in length. Through careful optimisation of the\ninterferometer and single photon detector, we achieve a quantum bit error ratio\nof 8.9% for a 122km link, allowing a secure shared key to be formed after error\ncorrection and privacy amplification. Key formation rates of up to 1.9 kbit/sec\nare achieved depending upon fiber length. We discuss the factors limiting the\nmaximum fiber length in quantum cryptography.",
    "arxiv_id": "quant-ph/0412171",
    "authors": [
      "C. Gobby",
      "Z. L. Yuan",
      "A. J. Shields"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1063/1.1738173",
    "journal_ref": "Applied Physics Letters 84, 3762-3764(2004)",
    "title": "Quantum key distribution over 122 km of standard telecom fiber",
    "url": "https://arxiv.org/abs/quant-ph/0412171"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "21e63577-4b45-498a-a1e8-4a2152e00cbb",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}