{
  "annotation_id": "788aef1d-f66a-46f5-9c80-e0c8cf8a7056",
  "date_created": "2026-03-02T18:02:34.365000Z",
  "date_modified": "2026-03-02T18:02:34.365000Z",
  "file_hash": "8fe422b83796febc223da5a4ee3e9d7b18b7dbfdf25507a3c077d0d7f3823cf1",
  "private": false,
  "record": {
    "abstract": "We proposed a scheme of continuous-variable quantum key distribution, in\nwhich the bright Einstein-Podolsky-Rosen entangled optical beams are utilized.\nThe source of the entangled beams is placed inside the receiving station, where\nhalf of the entangled beams are transmitted with round trip and the other half\nare retained by the receiver. The amplitude and phase signals modulated on the\nsignal beam by the sender are simultaneously extracted by the authorized\nreceiver with the scheme of the dense-coding correlation measurement for\ncontinuous quantum variables, thus the channel capacity is significantly\nimproved. Two kinds of possible eavesdropping are discussed. The mutual\ninformation and the secret key rates are calculated and compared with those of\nunidirectional transmission schemes.",
    "arxiv_id": "quant-ph/0612087",
    "authors": [
      "Xiaolong Su",
      "Jietai Jing",
      "Qing Pan",
      "Changde Xie"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.74.062305",
    "journal_ref": "Phys. Rev. A 74,062305 (2006)",
    "title": "Dense-coding quantum key distribution based on continuous-variable   entanglement",
    "url": "https://arxiv.org/abs/quant-ph/0612087"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "28a6074b-be19-4e82-bcdf-6942642b1345",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}