{
  "annotation_id": "c399bda6-c68a-4bcb-b46f-488c99732562",
  "date_created": "2026-03-02T18:02:24.027000Z",
  "date_modified": "2026-03-02T18:02:24.027000Z",
  "file_hash": "6fc03536ddc1ce4975207ce414860b51d9afaa4118d13d89d1d4298e482826fa",
  "private": false,
  "record": {
    "abstract": "We describe a general framework to study covariant symmetric broadcasting\nmaps for mixed qubit states. We explicitly derive the optimal N to M\nsuperbroadcasting maps, achieving optimal purification of the single-site\noutput copy, in both the universal and the phase covariant cases. We also study\nthe bipartite entanglement properties of the superbroadcast states.",
    "arxiv_id": "quant-ph/0602125",
    "authors": [
      "Francesco Buscemi",
      "Giacomo Mauro D\u0027Ariano",
      "Chiara Macchiavello",
      "Paolo Perinotti"
    ],
    "categories": [
      "quant-ph"
    ],
    "doi": "10.1103/PhysRevA.74.042309",
    "journal_ref": "Phys. Rev. A 74, 042309 (2006)",
    "title": "Universal and phase covariant superbroadcasting for mixed qubit states",
    "url": "https://arxiv.org/abs/quant-ph/0602125"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "8e92fa3b-9c52-4541-9c3c-2e09d36e05b6",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}