{
  "annotation_id": "dd1d889c-e774-4e74-8ae2-1a92522197a0",
  "date_created": "2026-03-02T18:02:31.146000Z",
  "date_modified": "2026-03-02T18:02:31.146000Z",
  "file_hash": "d97dd3d1df2ff00fb250c9b09b69e5d01721e0ed7d1399ff6c3ef9621577b213",
  "private": false,
  "record": {
    "abstract": "A crucial building block for quantum information processing with trapped ions\nis a controlled-NOT quantum gate. In this paper, two different sequences of\nlaser pulses implementing such a gate operation are analyzed using quantum\nprocess tomography. Fidelities of up to 92.6(6)% are achieved for single gate\noperations and up to 83.4(8)% for two concatenated gate operations. By process\ntomography we assess the performance of the gates for different experimental\nrealizations and demonstrate the advantage of amplitude--shaped laser pulses\nover simple square pulses. We also investigate whether the performance of\nconcatenated gates can be inferred from the analysis of the single gates.",
    "arxiv_id": "quant-ph/0609228",
    "authors": [
      "M. Riebe",
      "K. Kim",
      "P. Schindler",
      "T. Monz",
      "P. O. Schmidt",
      "T. K. Koerber",
      "W. Haensel",
      "H. Haeffner",
      "C. F. Roos",
      "R. Blatt"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.97.220407",
    "journal_ref": "Phys. Rev. Lett. 97, 220407 (2006)",
    "title": "Process tomography of ion trap quantum gates",
    "url": "https://arxiv.org/abs/quant-ph/0609228"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "71033ac8-bdb0-4e9a-b91e-3c12444a05ef",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}