{
  "annotation_id": "73438750-5b58-4763-8ebc-2b12ba9d55f1",
  "date_created": "2026-03-02T18:01:39.108000Z",
  "date_modified": "2026-03-02T18:01:39.108000Z",
  "file_hash": "7701c31fd5e3873562504d4934c3c496c38e0984a4132f1fa0b3c580a218cae3",
  "private": false,
  "record": {
    "abstract": "We present a method for the determination of the completely positive (CP) map\ndescribing a physical device based on random preparation of the input states,\nrandom measurements at the output, and maximum-likelihood principle. In the\nnumerical implementation the constraint of completely positivity can be imposed\nby exploiting the isomorphism between linear transformations from Hilbert\nspaces $\\cal H$ to $\\cal K$ and linear operators in ${\\cal K}\\otimes {\\cal H}$.\nThe effectiveness of the method is shown on the basis of some examples of\nreconstruction of CP maps related to quantum communication channels for qubits.",
    "arxiv_id": "quant-ph/0009104",
    "authors": [
      "Massimiliano F. Sacchi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.63.054104",
    "journal_ref": "Phys. Rev. A 63, 054104 (2001)",
    "title": "Maximum-likelihood reconstruction of CP maps",
    "url": "https://arxiv.org/abs/quant-ph/0009104"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "ac885372-cf6b-40fb-a69e-96d7ed19017d",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}