{
  "annotation_id": "3f3cc0a5-77b5-46e2-854a-c05bae6c856b",
  "date_created": "2026-03-02T18:02:23.422000Z",
  "date_modified": "2026-03-02T18:02:23.422000Z",
  "file_hash": "391b33c3c410c7a33e08022c3e4ff2ef4d32e9b6bb127026d44f00307e2d5294",
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  "record": {
    "abstract": "The characterization of the dynamics of quantum systems is a task of both\nfundamental and practical importance. A general class of methods which have\nbeen developed in quantum information theory to accomplish this task is known\nas quantum process tomography (QPT). In an earlier paper [M. Mohseni and D. A.\nLidar, Phys. Rev. Lett. 97, 170501 (2006)] we presented a new algorithm for\nDirect Characterization of Quantum Dynamics (DCQD) of two-level quantum\nsystems. Here we provide a generalization by developing a theory for direct and\ncomplete characterization of the dynamics of arbitrary quantum systems. In\ncontrast to other QPT schemes, DCQD relies on quantum error-detection\ntechniques and does not require any quantum state tomography. We demonstrate\nthat for the full characterization of the dynamics of n d-level quantum systems\n(with d a power of a prime), the minimal number of required experimental\nconfigurations is reduced quadratically from d^{4n} in separable QPT schemes to\nd^{2n} in DCQD.",
    "arxiv_id": "quant-ph/0601034",
    "authors": [
      "M. Mohseni",
      "D. A. Lidar"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.75.062331",
    "journal_ref": "Phys. Rev. A 75, 062331 (2007)",
    "title": "Direct Characterization of Quantum Dynamics: General Theory",
    "url": "https://arxiv.org/abs/quant-ph/0601034"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "6cba94ff-ba06-49ca-9ed9-4cd5d22f3278",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}