{
  "annotation_id": "3052c433-04a2-4135-9520-dad25f20607b",
  "date_created": "2026-03-02T18:01:41.432000Z",
  "date_modified": "2026-03-02T18:01:41.432000Z",
  "file_hash": "52f4fe81096d396411063d8ae9dc6aecdaba9f1dce5b12893fc04dbef8df6ee5",
  "private": false,
  "record": {
    "abstract": "We show that nonlocality of quantum mechanics cannot lead to superluminal\ntransmission of information, even if most general local operations are allowed,\nas long as they are linear and trace preserving. In particular, any quantum\nmechanical approximate cloning transformation does not allow signalling. On the\nother hand, the no-signalling constraint on its own is not sufficient to\nprevent a transformation from surpassing the known cloning bounds. We\nillustrate these concepts on the basis of some examples.",
    "arxiv_id": "quant-ph/0010070",
    "authors": [
      "D. Bruss",
      "G. M. D\u0027Ariano",
      "C. Macchiavello",
      "M. F. Sacchi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.62.062302",
    "journal_ref": "Phys. Rev. A 62, 62302 (2000)",
    "title": "Approximate quantum cloning and the impossibility of superluminal   information transfer",
    "url": "https://arxiv.org/abs/quant-ph/0010070"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "e5413912-6c5e-48fa-b36d-31d99ce82910",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}