{
  "annotation_id": "b6f2eebf-6c0a-440e-a4f7-fb8069324759",
  "date_created": "2026-03-02T18:01:38.857000Z",
  "date_modified": "2026-03-02T18:01:38.857000Z",
  "file_hash": "11416dbe2700ec210ca3d90a4c0c2514ed469c1a2262bf001b5c0c270f63d859",
  "private": false,
  "record": {
    "abstract": "We apply a general method for the estimation of completely positive maps to\nthe 1-to-2 universal covariant cloning machine. The method is based on the\nmaximum-likelihood principle, and makes use of random input states, along with\nrandom projective measurements on the output clones. The downhill simplex\nalgorithm is applied for the maximisation of the likelihood functional.",
    "arxiv_id": "quant-ph/0010004",
    "authors": [
      "Massimiliano F. Sacchi"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.64.022106",
    "journal_ref": "Phys. Rev. A 64, 022106 (2001).",
    "title": "Characterising a universal cloning machine by maximum-likelihood   estimation",
    "url": "https://arxiv.org/abs/quant-ph/0010004"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "0c3a3a21-b350-40a9-a0da-44c3fff10adf",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}