{
  "annotation_id": "56983e7d-a69b-4c31-bf61-ded9bfb7b971",
  "date_created": "2026-03-02T18:02:24.253000Z",
  "date_modified": "2026-03-02T18:02:24.253000Z",
  "file_hash": "760f3a3043c8116cebd296937028f4543b15baafae374651e8131a2cd3136897",
  "private": false,
  "record": {
    "abstract": "We present an example of quantum process tomography (QPT) performed on a\nsingle solid state qubit. The qubit used is two energy levels of the triplet\nstate in the Nitrogen-Vacancy defect in Diamond. Quantum process tomography is\napplied to a qubit which has been allowed to decohere for three different time\nperiods. In each case the process is found in terms of the chi matrix\nrepresentation and the affine map representation. The discrepancy between\nexperimentally estimated process and the closest physically valid process is\nnoted. The results of QPT performed after three different decoherence times are\nused to find the error generators, or Lindblad operators, for the system, using\nthe technique introduced by Boulant et al. [N. Boulant, T.F. Havel, M.A. Pravia\nand D.G. Cory, Phys. Rev. A 67, 042322 (2003)].",
    "arxiv_id": "quant-ph/0601167",
    "authors": [
      "M. Howard",
      "J. Twamley",
      "C. Wittmann",
      "T. Gaebel",
      "F. Jelezko",
      "J. Wrachtrup"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1088/1367-2630/8/3/033",
    "title": "Quantum process tomography and Linblad estimation of a solid state qubit",
    "url": "https://arxiv.org/abs/quant-ph/0601167"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "dce17cfd-1cfb-4f1b-bcc1-06bd27a74bc9",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}