{
  "annotation_id": "a2d6e261-e679-4178-973c-156901c13e20",
  "date_created": "2026-03-02T18:01:51.780000Z",
  "date_modified": "2026-03-02T18:01:51.780000Z",
  "file_hash": "ec84322a482bd09be03dc05a75338a4269bd4d6abe4ea67e8ca6723f1bdb5184",
  "private": false,
  "record": {
    "abstract": "We study the phase-covariant quantum cloning machine for qudits, i.e. the\ninput states in d-level quantum system have complex coefficients with arbitrary\nphase but constant module. A cloning unitary transformation is proposed. After\noptimizing the fidelity between input state and single qudit reduced density\nopertor of output state, we obtain the optimal fidelity for 1 to 2\nphase-covariant quantum cloning of qudits and the corresponding cloning\ntransformation.",
    "arxiv_id": "quant-ph/0205126",
    "authors": [
      "Heng Fan",
      "Hiroshi Imai",
      "Keiji Matsumoto",
      "Xiang-Bin Wang"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.67.022317",
    "journal_ref": "Phys.Rev.A67,022317 (2003)",
    "title": "Phase-covariant quantum cloning of qudits",
    "url": "https://arxiv.org/abs/quant-ph/0205126"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "296590cb-1468-41ef-a868-06b7175fa8b4",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}