{
  "id": "1101.0264",
  "version": "v2",
  "published": "2010-12-31T15:39:35.000Z",
  "updated": "2011-01-05T13:21:19.000Z",
  "title": "Subadditivity of the minimum output entropy and superactivation of the classical capacity of quantum multiple access channels",
  "authors": [
    "Lukasz Czekaj"
  ],
  "comment": "5 pages, 3 figures",
  "journal": "Phys. Rev. A 83, 042304 (2011)",
  "doi": "10.1103/PhysRevA.83.042304",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We study subadditivity of the minimum output entropy ($H_{min}$) of quantum multiple access channels (MACs). We provide an example of violation of the additivity theorem for $H_{min}$ known in classical information theory. Our result is based on a fundamental property of $MACs$ i.e. independence of each sender. The channels used in the example can be constructed explicitly. On the basis of subadditivity of $H_{min}$ we also provide an example of extremal superadditivity (super activation) of the classical capacity region of MACs.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2011-01-05T13:21:19.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.67.Hk",
      "89.70.Kn"
    ],
    "keywords": [
      "quantum multiple access channels",
      "minimum output entropy",
      "classical capacity",
      "subadditivity",
      "superactivation"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2011,
      "month": "Apr",
      "volume": 83,
      "number": 4,
      "pages": "042304"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011PhRvA..83d2304C"
    }
  }
}