{
  "annotation_id": "03d1b291-90ca-4b77-b1bf-df80c7158742",
  "date_created": "2026-03-02T18:02:06.989000Z",
  "date_modified": "2026-03-02T18:02:06.989000Z",
  "file_hash": "04319fa4b4c59be270a5f3bb208de069242df6d572c3eb7406601a5896cbacd3",
  "private": false,
  "record": {
    "abstract": "We introduce an approach to quantum cloning based on spin networks and we\ndemonstrate that phase covariant cloning can be realized using no external\ncontrol but only with a proper design of the Hamiltonian of the system. In the\n1 -\u003e 2 cloning we find that the XY model saturates the value for the fidelity\nof the optimal cloner and gives values comparable to it in the genera N -\u003e M\ncase. We finally discuss the effect of external noise. Our protocol is much\nmore robust to decoherence than a conventional procedure based on quantum\ngates.",
    "arxiv_id": "quant-ph/0402071",
    "authors": [
      "G. De Chiara",
      "R. Fazio",
      "C. Macchiavello",
      "S. Montangero",
      "G. M. Palma"
    ],
    "categories": [
      "quant-ph",
      "cond-mat.mes-hall"
    ],
    "doi": "10.1103/PhysRevA.70.062308",
    "journal_ref": "Phys. Rev. A 70, 062308 (2004)",
    "title": "Quantum cloning in spin networks",
    "url": "https://arxiv.org/abs/quant-ph/0402071"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0ed8b884-3f12-4f01-9cdc-815fe451e757",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}