{
  "annotation_id": "4af3831b-8e57-4494-90b5-7513a7902a10",
  "date_created": "2026-03-02T18:02:12.915000Z",
  "date_modified": "2026-03-02T18:02:12.915000Z",
  "file_hash": "a52ea72112198ecbbf3120604cd6a7129441a5959dc78fd1565f8f8ebd9e9e36",
  "private": false,
  "record": {
    "abstract": "The whole Hilbert state space of an n-qubit spin system can be divided into\n(n+1) state subspaces according to the angular momentum theory of quantum\nmechanics. Here it is shown that any unknown state in such a state subspace,\nwhose dimensional size is proportional to either a polynomial or exponential\nfunction of the qubit number n, can be transferred efficiently into a larger\nsubspace with a dimensional size generally proportional to an exponential\nfunction of the qubit number by the multiple-quantum unitary transformation\nwith a subspace-selective multiple-quantum unitary operator. The efficient\nquantum circuits for the subspace-selective multiple-quantum unitary operators\nare really constructed.",
    "arxiv_id": "quant-ph/0411046",
    "authors": [
      "Xijia Miao"
    ],
    "categories": [
      "quant-ph"
    ],
    "title": "Efficient multiple-quantum transition processes in an n-qubit spin   system",
    "url": "https://arxiv.org/abs/quant-ph/0411046"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "d26cef9d-93a1-4c3c-94b6-e51f7adc1e7b",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}