{
  "annotation_id": "b157be28-5d78-4515-a314-bdc9ef4bb10a",
  "date_created": "2026-03-02T18:02:13.832000Z",
  "date_modified": "2026-03-02T18:02:13.832000Z",
  "file_hash": "269527e20b2e80289eb4b3dfafabd87deeaa3940d3c474e6345068aebe6dc714",
  "private": false,
  "record": {
    "abstract": "Weak coherent states as a photon source for quantum cryptography have limit\nin secure data rate and transmission distance because of the presence of\nmulti-photon events and loss in transmission line. Two-photon events in a\ncoherent state can be taken out by a two-photon interference scheme. We\ninvestigate the security issue of utilizing this modified coherent state in\nquantum cryptography. A 4 dB improvement in secure data rate or a nearly\ntwo-fold increase in transmission distance over the coherent state are found.\nWith a recently proposed and improved encoding strategy, further improvement is\npossible.",
    "arxiv_id": "quant-ph/0501175",
    "authors": [
      "Y. J. Lu",
      "Luobei Zhu",
      "Z. Y. Ou"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.71.032315",
    "title": "Security improvement of using modified coherent state for quantum   cryptography",
    "url": "https://arxiv.org/abs/quant-ph/0501175"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5906a764-51ed-47d7-82f9-709fd50bacd0",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}