{
  "annotation_id": "7bf57cd1-d680-4d2b-9941-43f060c17b39",
  "date_created": "2026-03-02T18:02:00.259000Z",
  "date_modified": "2026-03-02T18:02:00.259000Z",
  "file_hash": "b0d710a20f9040b1c715f10c92828a18bbeebca3246d52926ecc4bb86c192931",
  "private": false,
  "record": {
    "abstract": "We propose a prepare-and-measure scheme for quantum key distribution with\n2-bit quantum codes. The protocol is unconditionally secure under whatever type\nof intercept-and-resend attack. Given the symmetric and independent errors to\nthe transmitted qubits, our scheme can tolerate a bit error rate up to 26% in\n4-state protocol and 30% in 6-state protocol, respectively. These values are\nhigher than all currently known threshold values for prepare-and-measure\nprotocols. A specific realization with linear optics is given.",
    "arxiv_id": "quant-ph/0308057",
    "authors": [
      "Xiang-Bin Wang"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.92.077902",
    "title": "Quantum key distribution with 2-bit quantum codes",
    "url": "https://arxiv.org/abs/quant-ph/0308057"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "961f9959-0fd9-4553-b809-25c1ef7010fa",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}