{
  "id": "0902.2834",
  "version": "v2",
  "published": "2009-02-17T14:25:48.000Z",
  "updated": "2009-06-26T10:06:03.000Z",
  "title": "The classical capacity of quantum channels with memory",
  "authors": [
    "Tony Dorlas",
    "Ciara Morgan"
  ],
  "comment": "6 double-column pages. Short note added on quantum memory channels",
  "journal": "Phys. Rev. A 79, 032320 (2009)",
  "doi": "10.1103/PhysRevA.79.032320",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We investigate the classical capacity of two quantum channels with memory: a periodic channel with depolarizing channel branches, and a convex combination of depolarizing channels. We prove that the capacity is additive in both cases. As a result, the channel capacity is achieved without the use of entangled input states. In the case of a convex combination of depolarizing channels the proof provided can be extended to other quantum channels whose classical capacity has been proved to be additive in the memoryless case.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2009-06-26T10:06:03.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.67.-a"
    ],
    "keywords": [
      "quantum channels",
      "classical capacity",
      "convex combination",
      "depolarizing channel branches",
      "periodic channel"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2009,
      "month": "Mar",
      "volume": 79,
      "number": 3,
      "pages": "032320"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2009PhRvA..79c2320D"
    }
  }
}