{
  "id": "quant-ph/0506251",
  "version": "v1",
  "published": "2005-06-29T11:40:36.000Z",
  "updated": "2005-06-29T11:40:36.000Z",
  "title": "Superbroadcasting of mixed states",
  "authors": [
    "Giacomo Mauro D'Ariano",
    "Chiara Macchiavello",
    "Paolo Perinotti"
  ],
  "comment": "4 pages, 4 figures, to appear on Phys. Rev. Lett",
  "journal": "Phys. Rev. Lett. 95, 060503 (2005)",
  "doi": "10.1103/PhysRevLett.95.060503",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We derive the optimal universal broadcasting for mixed states of qubits. We show that the nobroadcasting theorem cannot be generalized to more than a single input copy. Moreover, for four or more input copies it is even possible to purify the input states while broadcasting. We name such purifying broadcasting superbroadcasting.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2005-06-29T11:40:36.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "mixed states",
      "superbroadcasting",
      "single input copy",
      "input states"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. Lett."
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}