{
  "annotation_id": "d69168ff-1a2c-4f55-83a9-70137a91b0f6",
  "date_created": "2026-03-02T18:01:46.028000Z",
  "date_modified": "2026-03-02T18:01:46.028000Z",
  "file_hash": "6625269c4fb904c29984d81c383a89bfff3f0d0963aaeaa1de35d8d6bb06a4b9",
  "private": false,
  "record": {
    "abstract": "An optimal universal cloning transformation is derived that produces M copies\nof an unknown qubit from a pair of orthogonal qubits. For M\u003e6, the\ncorresponding cloning fidelity is higher than that of the optimal copying of a\npair of identical qubits. It is shown that this cloning transformation can be\nimplemented probabilistically via parametric down-conversion by feeding the\nsignal and idler modes of a nonlinear crystal with orthogonally polarized\nphotons.",
    "arxiv_id": "quant-ph/0110016",
    "authors": [
      "J. Fiurasek",
      "S. Iblisdir",
      "S. Massar",
      "N. J. Cerf"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.65.040302",
    "journal_ref": "Phys. Rev. A 65, 040302(R) (2002).",
    "title": "Quantum cloning of orthogonal qubits",
    "url": "https://arxiv.org/abs/quant-ph/0110016"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "bafbd2d3-5531-4de2-a218-552807976461",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}