{
  "annotation_id": "370e90ec-2981-4371-95a7-da6c76a93502",
  "date_created": "2026-03-02T18:02:17.220000Z",
  "date_modified": "2026-03-02T18:02:17.220000Z",
  "file_hash": "81ce570c78899e177c6e0a5c8982af5417975a26afa05fbbe85fd1c0cd30c4e5",
  "private": false,
  "record": {
    "abstract": "It is the first scheme which allows the detection apparatus to achieve both\nthe photon number of arriving signals and quantum bit error rate of the\nmultiphoton pulses precisely. We show that the upper bound of the fraction of\nthe tagged multiphoton pulses counts is $\\mu $, which is independent of the\nchannel loss and the intensity of the decoy source. Such upper bound is\n$inherent$ and cannot be reduced any longer as long as the weak coherent\nscouces and high lossy channel are used. We show that our scheme can be\nimplemented even if the channel loss is very high. A stronger intensity of the\npulse source is allowable to improve the rate of quantum key distribution. Both\nthe signal pulses and decoy pulses can be used to generate the raw key after\nverified the security of the communication. We analyze that our scheme is\noptimal under today\u0027s technology.\n  PACS: 03.67.Dd",
    "arxiv_id": "quant-ph/0504221",
    "authors": [
      "Qing-yu Cai"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Optimal Experimental Scheme for Bennett-Brassard 1984 Quantum Key   Distribution Protocol with Weak Coherent Sources, Noisy and Lossy Channel",
    "url": "https://arxiv.org/abs/quant-ph/0504221"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "5946a7c6-e671-42d6-97ca-4838ff0fd589",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}