{
  "annotation_id": "c976b39a-b3ee-474b-98d2-3e59f3c1470a",
  "date_created": "2026-03-02T18:02:27.564000Z",
  "date_modified": "2026-03-02T18:02:27.564000Z",
  "file_hash": "167898eb87952cde2ddb3a835ac5a52c5973c0aaf1912448f53c7277ea41a1aa",
  "private": false,
  "record": {
    "abstract": "We analyze the capacity of a simultaneous quantum secure direct communication\nscheme between the central party and other $M$ parties via $M+1$-particle GHZ\nstates and swapping quantum entanglement. It is shown that the encoding scheme\nshould be secret if other $M$ parties wants to transmit $M+1$ bit classical\nmessages to the center party secretly. However when the encoding scheme is\nannounced publicly, we prove that the capacity of the scheme in transmitting\nthe secret messages is 2 bits, no matter how big $M$ is.",
    "arxiv_id": "quant-ph/0604129",
    "authors": [
      "Ting Gao",
      "Feng-Li Yan",
      "Zhi-Xi Wang",
      "You-Cheng Li"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0256-307X/23/10/009",
    "journal_ref": "Chinese Physics Letters, 23 (2006) 2656",
    "title": "Capacity of a simultaneous quantum secure direct communication scheme   between the central party and other M parties",
    "url": "https://arxiv.org/abs/quant-ph/0604129"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "01f6fc9d-c1c4-4090-b702-9f95aaea8ce7",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}