{
  "annotation_id": "fc840014-adf7-4996-ab6c-ce5b4a74b5a6",
  "date_created": "2026-03-02T18:01:52.302000Z",
  "date_modified": "2026-03-02T18:01:52.302000Z",
  "file_hash": "435a34aced39d70e8afbaaa1819ef743102a022be0e7e4e8ff3a1efa26d8222e",
  "private": false,
  "record": {
    "abstract": "A scheme is presented for protecting one-qubit quantum information against\ndecoherence due to a general environment and local exchange interactions. The\nscheme operates essentially by distributing information over two pairs of\nqubits and through error prevention procedures. In the scheme, quantum\ninformation is encoded through a decoherence-free subspace for collective phase\nerrors and exchange errors affecting the qubits in pairs; leakage out of the\nencoding space due to amplitude damping is reduced by quantum Zeno effect. In\naddition, how to construct decoherence-free states for n-qubit information\nagainst phase and exchange errors is discussed.",
    "arxiv_id": "quant-ph/0207063",
    "authors": [
      "Chui-Ping Yang",
      "Shih-I Chu",
      "Siyuan Han"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.66.034301",
    "journal_ref": "Physical Review A 66, 034301 (2002)",
    "title": "Error prevention scheme with two pairs of qubits",
    "url": "https://arxiv.org/abs/quant-ph/0207063"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "918f3c1e-e464-4aa9-8e1c-05beb1b22d1c",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}