{
  "annotation_id": "578c545d-bf62-4fe2-8893-304414c32208",
  "date_created": "2026-03-02T18:01:56.059000Z",
  "date_modified": "2026-03-02T18:01:56.059000Z",
  "file_hash": "351827cb04a16902d426eb1a047492c3d3302a2c9c986f98750a14f04173d5f6",
  "private": false,
  "record": {
    "abstract": "It is shown that any quantum operation that perfectly clones the entanglement\nof all maximally-entangled qubit pairs cannot preserve separability. This\n``entanglement no-cloning\u0027\u0027 principle naturally suggests that some approximate\ncloning of entanglement is nevertheless allowed by quantum mechanics. We\ninvestigate a separability-preserving optimal cloning machine that duplicates\nall maximally-entangled states of two qubits, resulting in 0.285 bits of\nentanglement per clone, while a local cloning machine only yields 0.060 bits of\nentanglement per clone.",
    "arxiv_id": "quant-ph/0302173",
    "authors": [
      "Louis-Philippe Lamoureux",
      "Patrick Navez",
      "Jaromir Fiurasek",
      "Nicolas J. Cerf"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.69.040301",
    "journal_ref": "Phys. Rev. A 69, 040301 (2004).",
    "title": "Cloning the entanglement of a pair of quantum bits",
    "url": "https://arxiv.org/abs/quant-ph/0302173"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "f6fa17f4-8ed8-4b35-8239-54e231393e4a",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}