{
  "annotation_id": "56997e60-182a-4e92-9c5e-8cdbd2c331f5",
  "date_created": "2026-03-02T18:02:00.269000Z",
  "date_modified": "2026-03-02T18:02:00.269000Z",
  "file_hash": "91810a231894524553754cd0664af5cf61c2de77c98b99279c423b1d37820348",
  "private": false,
  "record": {
    "abstract": "We define \"coherent communication\" in terms of a simple primitive, show it is\nequivalent to the ability to send a classical message with a unitary or\nisometric operation, and use it to relate other resources in quantum\ninformation theory. Using coherent communication, we are able to generalize\nsuper-dense coding to prepare arbitrary quantum states instead of only\nclassical messages. We also derive single-letter formulae for the classical and\nquantum capacities of a bipartite unitary gate assisted by an arbitrary fixed\namount of entanglement per use.",
    "arxiv_id": "quant-ph/0307091",
    "authors": [
      "Aram W. Harrow"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.92.097902",
    "journal_ref": "Phys. Rev. Lett. 92, 097902 (2004)",
    "title": "Coherent Communication of Classical Messages",
    "url": "https://arxiv.org/abs/quant-ph/0307091"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "17a3b350-ff34-46fd-8624-183a33e378a2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}