{
  "annotation_id": "1a3c990a-1cb0-46e3-8682-6a885e97ef76",
  "date_created": "2026-03-02T18:02:45.192000Z",
  "date_modified": "2026-03-02T18:02:45.192000Z",
  "file_hash": "778119690ccd215ef396671c9861b1c411c0028588f88370ece09934fce192b1",
  "private": false,
  "record": {
    "abstract": "It is well known that quantum theory forbids the exact copying of an unknown\nquantum state. Therefore in broadcasting of classical information by a quantum\nchannel an additional contribution to the error in the decoding is expected. We\nconsider the optimal copying transformation which is adapted to classical\ninformation transmission by two linearly independent quantum states, and show\nthat there is no additional contribution to the error. Instead the clones are\ncorrelated, and this breaks their usefulness: The entanglement increases with\nnon-orthogonality of the states. The capacity of the corresponding quantum\nchannel is considered also.",
    "arxiv_id": "quant-ph/9805067",
    "authors": [
      "A. E. Allahverdyan",
      "D. B. Saakian"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "The broadcast quantum channel for classical information transmission",
    "url": "https://arxiv.org/abs/quant-ph/9805067"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "24a57888-02ab-4814-94d2-d809fd2bfa73",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}