{
  "annotation_id": "30008f4f-0875-4039-9d5d-640fcdf0c200",
  "date_created": "2026-03-02T18:02:13.070000Z",
  "date_modified": "2026-03-02T18:02:13.070000Z",
  "file_hash": "46e7e07ab6ca01d13076020c50cf176f33a86e613eee9c627973e79f78eaa04a",
  "private": false,
  "record": {
    "abstract": "We solve the problem of the optimal cloning of pure entangled two-qubit\nstates with a fixed degree of entanglement using local operations and classical\ncommunication. We show, that amazingly, classical communication between the\nparties can improve the fidelity of local cloning if and only if the initial\nentanglement is higher than a certain critical value. It is completely useless\nfor weakly entangled states. We also show that bound entangled states with\npositive partial transpose are not useful as a resource to improve the best\nlocal cloning fidelity.",
    "arxiv_id": "quant-ph/0502103",
    "authors": [
      "Rafal Demkowicz-Dobrzanski",
      "Maciej Lewenstein",
      "Aditi Sen De",
      "Ujjwal Sen",
      "Dagmar Bruss"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.73.032313",
    "journal_ref": "Phys. Rev. A 73, 032313 (2006)",
    "title": "Usefulness of classical communication for local cloning of entangled   states",
    "url": "https://arxiv.org/abs/quant-ph/0502103"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "4d040a8d-50e5-406b-b7c4-44c747be000b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}