{
  "annotation_id": "57ef0a33-e40d-4e58-9ba8-1953b5ab85a1",
  "date_created": "2026-03-02T18:01:55.463000Z",
  "date_modified": "2026-03-02T18:01:55.463000Z",
  "file_hash": "3441883ca5c58a9c56947d80deab12132a55b56eb430ddce679547fddb153579",
  "private": false,
  "record": {
    "abstract": "Assuming the condition of no superluminal signalling, we got an upper bound\non the quality of all asymmetric $ 1\\to 2$ cloning machines, acting on qubits\nwhose Bloch vectors lie on a great circle. Then we constructed an $ 1\\to 2$\ncloning machine, which asymmetrically clone all qubits corresponding to this\ngreat circle, and this machine matches with that upper bound, and hence this is\noptimal one.",
    "arxiv_id": "quant-ph/0211169",
    "authors": [
      "Samir Kunkri",
      "Md. Manirul Ali",
      "Geetu Narang",
      "Debasis Sarkar"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Optimal asymmetric cloning machine on a great circle using no-signalling   condition",
    "url": "https://arxiv.org/abs/quant-ph/0211169"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "bb43bb4d-f63a-41d8-99f5-ff4059746030",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}