{
  "annotation_id": "a7e95a49-f91c-4301-b470-f9c7b523d83b",
  "date_created": "2026-03-02T18:02:20.239000Z",
  "date_modified": "2026-03-02T18:02:20.239000Z",
  "file_hash": "8455114c6a92ca45d83ef172eed2f666e181386fb78ff1d7ece6b2ec7080c9fa",
  "private": false,
  "record": {
    "abstract": "In this paper we present an approach to quantum cloning via free dynamical\nevolution of spin networks. By properly designing the network and the couplings\nbetween spins, we show that optimal 1-\u003eM phase covariant cloning can be\nachieved without any external control. Especially, when M is an odd number, the\noptimal phase-covariant cloning can be achieved without ancillas. Moreover, we\ndemonstrate that the same framework is capable for optimal 1-\u003e2 universal\ncloning.",
    "arxiv_id": "quant-ph/0510147",
    "authors": [
      "Qing Chen",
      "Jianhua Cheng",
      "Ke-Lin Wang",
      "Jiangfeng Du"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.74.034303",
    "journal_ref": "Phys. Rev. A 74, 034303 (2006)",
    "title": "Optimal quantum cloning via spin networks",
    "url": "https://arxiv.org/abs/quant-ph/0510147"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "bae6511a-fd6e-4dc4-998b-29f1fe0f7eb1",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}