{
  "annotation_id": "384a4609-0ede-4906-9a8d-f91de0f890c9",
  "date_created": "2026-03-02T18:02:44.484000Z",
  "date_modified": "2026-03-02T18:02:44.484000Z",
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  "record": {
    "abstract": "We introduce a new decomposition of the multiqubit states of the form\n$\\rho^{\\otimes N}$ and employ it to construct the optimal single qubit\npurification procedure. The same decomposition allows us to study optimal\nquantum cloning and state estimation of mixed states.",
    "arxiv_id": "quant-ph/9812075",
    "authors": [
      "J. I. Cirac",
      "A. K. Ekert",
      "C. Macchiavello"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevLett.82.4344",
    "journal_ref": "Phys.Rev.Lett. 82 (1999) 4344-4347",
    "title": "Optimal purification of single qubits",
    "url": "https://arxiv.org/abs/quant-ph/9812075"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "aa89f7a4-fb40-4a09-81f3-fae6f23fa555",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}