{
  "id": "1204.3000",
  "version": "v3",
  "published": "2012-04-13T14:10:31.000Z",
  "updated": "2012-04-18T12:15:23.000Z",
  "title": "Unconditional Security with Decoherence-Free Subspaces",
  "authors": [
    "Elloá B. Guedes",
    "Francisco M. de Assis"
  ],
  "comment": "6 pages, 1 figure. Submitted to Physical Review A",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We show how to use decoherence-free subspaces over collective-noise quantum channels to convey classical information in perfect secrecy. We argue that codes defined over decoherence-free subspaces are codes for quantum wiretap channels in which the gain of information by a non-authorized receiver is zero. We also show that if some symmetry conditions are guaranteed, the maximum rate on which these secret communications take place is equal to the Holevo-Schumacher-Westmoreland capacity of the quantum channel.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2012-04-18T12:15:23.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "decoherence-free subspaces",
      "unconditional security",
      "collective-noise quantum channels",
      "quantum wiretap channels",
      "convey classical information"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 6,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012arXiv1204.3000G"
    }
  }
}