{
  "annotation_id": "5fd0b97f-1cfd-4f2e-a3d1-3f0fa9c772a6",
  "date_created": "2026-03-02T18:02:10.240000Z",
  "date_modified": "2026-03-02T18:02:10.240000Z",
  "file_hash": "0b6cf515634548d331eb8948c9f005c4d8989850f6b2a7c3c6daf5de607a6faf",
  "private": false,
  "record": {
    "abstract": "Using quantum mechanics, secure direct communication between distant parties\ncan be performed. Over a noisy quantum channel, quantum privacy amplification\nis a necessary step to ensure the security of the message. In this paper, we\npresent a quantum privacy amplification scheme for quantum secure direct\ncommunication using single photons. The quantum privacy amplification procedure\ncontains two control-not gates and a Hadamard gate. After the unitary gate\noperations, a measurement is performed and one photon is retained. The retained\nphoton carries the state information of the discarded photon, and hence reduces\nthe information leakage. The procedure can be performed recursively so that the\ninformation leakage can be reduced to any arbitrarily low level.",
    "arxiv_id": "quant-ph/0408102",
    "authors": [
      "Fu-Guo Deng",
      "Gui Lu Long"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Quantum privacy amplification for quantum secure direct communication",
    "url": "https://arxiv.org/abs/quant-ph/0408102"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "517205b8-25da-427a-9f50-c3a1732c5f76",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}