{
  "annotation_id": "1bbeafdc-a8ce-4889-bbd3-ae08a63c979a",
  "date_created": "2026-03-02T18:02:16.809000Z",
  "date_modified": "2026-03-02T18:02:16.809000Z",
  "file_hash": "e9d3984b5264159b0369cb010bfa1d7e63c2ca290e44553f4b096d0b73d56c47",
  "private": false,
  "record": {
    "abstract": "Electron spins in semiconductor quantum dots are promising candidates for the\nexperimental realization of solid-state qubits. We analyze the dynamics of a\nsystem of three qubits arranged in a linear geometry and a system of four\nqubits arranged in a square geometry. Calculations are performed for several\nquantum dot confining potentials. In the three-qubit case, three-body effects\nare identified that have an important quantitative influence upon quantum\ncomputation. In the four-qubit case, the full Hamiltonian is found to include\nboth three-body and four-body interactions that significantly influence the\ndynamics in physically relevant parameter regimes. We consider the implications\nof these results for the encoded universality paradigm applied to the\nfour-electron qubit code; in particular, we consider what is required to\ncircumvent the four-body effects in an encoded system (four spins per encoded\nqubit) by the appropriate tuning of experimental parameters.",
    "arxiv_id": "quant-ph/0504165",
    "authors": [
      "Ryan Woodworth",
      "Ari Mizel",
      "Daniel A. Lidar"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/0953-8984/18/21/S02",
    "journal_ref": "J. Phys. Cond. Mat. 18, S721 (2006)",
    "title": "Few-body spin couplings and their implications for universal quantum   computation",
    "url": "https://arxiv.org/abs/quant-ph/0504165"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "b2578a73-ae9e-4be7-8f60-93a77ca7ca22",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}