{
  "annotation_id": "bc43265a-5e83-401b-a4e6-f124cf836e6d",
  "date_created": "2026-03-02T18:02:40.452000Z",
  "date_modified": "2026-03-02T18:02:40.452000Z",
  "file_hash": "bc8b5bcc008af0f6d88683eb4f5e56986a8bf35ccbf31007b55055089e2d9ddc",
  "private": false,
  "record": {
    "abstract": "A scheme is proposed for protecting quantum states from both independent\ndecoherence and cooperative decoherence. The scheme operates by pairing each\nqubit (two-state quantum system) with an ancilla qubit and by encoding the\nstates of the qubits into the corresponding coherence-preserving states of the\nqubit-pairs. In this scheme, the amplitude damping (loss of energy) is\nprevented as well as the phase damping (dephasing) by a strategy called the\nfree-Hamiltonian-elimination We further extend the scheme to include quantum\ngate operations and show that loss and decoherence during the gate operations\ncan also be prevented.",
    "arxiv_id": "quant-ph/9703040",
    "authors": [
      "Lu-Ming Duan",
      "Guang-Can Guo"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.79.1953",
    "journal_ref": "Phys.Rev.Lett.79:1953-1956,1997",
    "title": "Preserving coherence in quantum computation by pairing quantum bits",
    "url": "https://arxiv.org/abs/quant-ph/9703040"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b494c021-cb1d-481f-a66a-72cd275e7dd3",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}