{
  "annotation_id": "588423a8-820b-4015-a588-cd083bc74fce",
  "date_created": "2026-03-02T18:02:48.001000Z",
  "date_modified": "2026-03-02T18:02:48.001000Z",
  "file_hash": "ebb107a6be22e3f0be566a67b172264beb887896bc739f432c4fc5f522fc2d71",
  "private": false,
  "record": {
    "abstract": "We study quantum cloning machines (QCM) that act on an unknown N-level\nquantum state and make M copies. We give a formula for the maximum of the\nfidelity of cloning and exhibit the unitary transformations that realize this\noptimal fidelity. We also extend the results to treat the case of M copies from\n$N^\\prime$ ($M\u003eN^\\prime$) identical N-level quantum systems.",
    "arxiv_id": "quant-ph/9912038",
    "authors": [
      "Sergio Albeverio",
      "Shao-Ming Fei"
    ],
    "categories": [
      "quant-ph",
      "cond-mat",
      "hep-th"
    ],
    "doi": "10.1007/s100510051077",
    "journal_ref": "Eur.Phys.J. B14 (2000) 669-672",
    "title": "A Remark on the Optimal Cloning of An N-Level Quantum System",
    "url": "https://arxiv.org/abs/quant-ph/9912038"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "3b9317f5-bd04-467c-a25c-9183f9a25888",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}