{
  "annotation_id": "005af1a6-c8c0-461e-945b-c9ac5108d06d",
  "date_created": "2026-03-02T18:01:38.856000Z",
  "date_modified": "2026-03-02T18:01:38.856000Z",
  "file_hash": "e4f07e410432da41697153b447680c2b6c07dd91316a45d29c4d2889a213796e",
  "private": false,
  "record": {
    "abstract": "We find that very different quantum copying machines are optimal depending on\nthe indicator used to assess their performance. Several quantum copying machine\nmodels acting on non-orthogonal input states are investigated, and assessed\naccording to two types of criteria: Transfer of (Shannon) information encoded\nin the initial states to the copies, and fidelity between the copies and the\ninitial states. Transformations which optimise information transfer for\nmessages encoded in qubits are found. If the message is decoded one symbol\nat-a-time, information is best copied by a Wootters-Zurek copier.",
    "arxiv_id": "quant-ph/0003054",
    "authors": [
      "P. Deuar",
      "W. J. Munro"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.61.062304",
    "journal_ref": "Phys. Rev. A. 61, 062304 (2000)",
    "title": "Information transfer and fidelity in quantum copiers",
    "url": "https://arxiv.org/abs/quant-ph/0003054"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "9df16a1f-1268-4689-a6cd-704f8f7332d5",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}