{
  "annotation_id": "e3e7b81c-87e0-4ac9-9eab-70d269f60dc5",
  "date_created": "2026-03-02T18:02:30.563000Z",
  "date_modified": "2026-03-02T18:02:30.563000Z",
  "file_hash": "8b9b462d7ad4e464e601bd96d8793d4bd89d57277bfd032ff9d903d948613a79",
  "private": false,
  "record": {
    "abstract": "To improve the performance of a quantum key distribution (QKD) system, high\nspeed, low dark count single photon detectors (or low noise homodyne detectors)\nare required. However, in practice, a fast detector is usually noisy. Here, we\npropose a \"dual detectors\" method to improve the performance of a practical QKD\nsystem with realistic detectors: the legitimate receiver randomly uses either a\nfast (but noisy) detector or a quiet (but slow) detector to measure the\nincoming quantum signals. The measurement results from the quiet detector can\nbe used to bound eavesdropper\u0027s information, while the measurement results from\nthe fast detector are used to generate secure key. We apply this idea to\nvarious QKD protocols. Simulation results demonstrate significant improvements\nin both BB84 protocol with ideal single photon source and Gaussian-modulated\ncoherent states (GMCS) protocol; while for decoy-state BB84 protocol with weak\ncoherent source, the improvement is moderate. We also discuss various practical\nissues in implementing the \"dual detectors\" scheme.",
    "arxiv_id": "quant-ph/0611044",
    "authors": [
      "Bing Qi",
      "Yi Zhao",
      "Xiongfeng Ma",
      "Hoi-Kwong Lo",
      "Li Qian"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.052304",
    "journal_ref": "Physical Review A 75 052304 (2007)",
    "title": "Quantum key distribution with \"dual detectors\"",
    "url": "https://arxiv.org/abs/quant-ph/0611044"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f2e9ee90-6396-4260-832a-77c13236a674",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}