{
  "annotation_id": "c10d2f3c-debc-4866-8445-d05b27453c94",
  "date_created": "2026-03-02T18:02:17.092000Z",
  "date_modified": "2026-03-02T18:02:17.092000Z",
  "file_hash": "b60f5c57f8dd7fe487e86d939cafcb67268aa8d107f7f36198842c0867d0e84d",
  "private": false,
  "record": {
    "abstract": "We have found a quantum cloning machine that optimally duplicates the\nentanglement of a pair of $d$-dimensional quantum systems. It maximizes the\nentanglement of formation contained in the two copies of any\nmaximally-entangled input state, while preserving the separability of\nunentangled input states. Moreover, it cannot increase the entanglement of\nformation of all isotropic states. For large $d$, the entanglement of formation\nof each clone tends to one half the entanglement of the input state, which\ncorresponds to a classical behavior. Finally, we investigate a local\nentanglement cloner, which yields entangled clones with one fourth the input\nentanglement in the large-$d$ limit.",
    "arxiv_id": "quant-ph/0503148",
    "authors": [
      "E. Karpov",
      "P. Navez",
      "N. J. Cerf"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.72.042314",
    "journal_ref": "Phys. Rev. A 72, 042314 (2005)",
    "title": "Cloning quantum entanglement in arbitrary dimensions",
    "url": "https://arxiv.org/abs/quant-ph/0503148"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "39364813-1b0e-4992-8efa-f631ff0f9615",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}