{
  "annotation_id": "8200cd73-3a2d-4136-bad6-41e5bd49ad29",
  "date_created": "2026-03-02T18:02:33.973000Z",
  "date_modified": "2026-03-02T18:02:33.973000Z",
  "file_hash": "a1ab5be4dfe74632d97efae10ddc27d844827d72ceb3385575640bea444144ee",
  "private": false,
  "record": {
    "abstract": "Recently Xia and Song [Phys. Lett. A (In press)] have proposed a controlled\nquantum secure direct communication (CQSDC) protocol. They claimed that in\ntheir protocol only with the help of the controller Charlie, the receiver Alice\ncan successfully extract the secret message from the sender Bob. In this\nletter, first we will show that within their protocol the controller Charlie\u0027s\nrole can be excluded due to their unreasonable design. We then revise the\nXia-Song CQSDC protocol such that its original advantages are retained and the\nCQSDC can be really realized.",
    "arxiv_id": "quant-ph/0612206",
    "authors": [
      "Jun Liu",
      "Zhan-jun Zhang"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Revisiting controlled quantum secure direct communication using a   non-symmetric quantum channel with quantum superdense coding",
    "url": "https://arxiv.org/abs/quant-ph/0612206"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9fab851d-5121-4fc5-8a59-69bfa32ab0b6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}