{
  "annotation_id": "912d49c1-07ef-45c5-98d9-4451a6321a2e",
  "date_created": "2026-03-02T18:01:42.688000Z",
  "date_modified": "2026-03-02T18:01:42.688000Z",
  "file_hash": "764037aeaf069d54d31b80f752d13dbc3830608df6137a52b1ecde1aace0ea4f",
  "private": false,
  "record": {
    "abstract": "We consider non-universal cloning maps, namely cloning transformations which\nare covariant under a proper subgroup G of the universal unitary group U(d),\nwhere d is the dimension of the Hilbert space H of the system to be cloned. We\ngive a general method for optimizing cloning for any cost-function. Examples of\napplications are given for the phase-covariant cloning (cloning of equatorial\nqubits) and for the Weyl-Heisenberg group (cloning of \"continuous variables\").",
    "arxiv_id": "quant-ph/0101100",
    "authors": [
      "G. M. D\u0027Ariano",
      "P. Lo Presti"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.64.042308",
    "title": "Optimal Non-Universally Covariant Cloning",
    "url": "https://arxiv.org/abs/quant-ph/0101100"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "40464433-2215-4f98-baae-e23ef5e61bd2",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}