{
  "annotation_id": "fe02a948-d715-4f5e-80f6-a9a3e743a2e2",
  "date_created": "2026-03-02T18:02:48.422000Z",
  "date_modified": "2026-03-02T18:02:48.422000Z",
  "file_hash": "fa420fd587afb90d16f28f5e828c19915d8e96c32fe8e28cb067b64ea80aaf2b",
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  "record": {
    "abstract": "The cloning of quantum variables with continuous spectra is analyzed. A\nuniversal - or Gaussian - quantum cloning machine is exhibited that copies\nequally well the states of two conjugate variables such as position and\nmomentum. It also duplicates all coherent states with a fidelity of 2/3. More\ngenerally, the copies are shown to obey a no-cloning Heisenberg-like\nuncertainty relation.",
    "arxiv_id": "quant-ph/9909037",
    "authors": [
      "N. J. Cerf",
      "A. Ipe",
      "X. Rottenberg"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.85.1754",
    "journal_ref": "Phys. Rev. Lett. 85 (2000) 1754",
    "title": "Universal cloning of continuous quantum variables",
    "url": "https://arxiv.org/abs/quant-ph/9909037"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "a4e8cf86-f9eb-45f4-a041-6eda3fe273b1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}