{
  "id": "1104.1843",
  "version": "v1",
  "published": "2011-04-11T04:42:35.000Z",
  "updated": "2011-04-11T04:42:35.000Z",
  "title": "Quantum discord and geometry for a class of two-qubit states",
  "authors": [
    "Bo Li",
    "Zhi-Xi Wang",
    "Shao-Ming Fei"
  ],
  "comment": "5 pages, 5 figures",
  "journal": "Physical Review A 83, 022321(2011)",
  "doi": "10.1103/PhysRevA.83.022321",
  "categories": [
    "quant-ph"
  ],
  "abstract": "We study the level surfaces of quantum discord for a class of two-qubit states with parallel nonzero Bloch vectors. The dynamic behavior of quantum discord under decoherence is investigated. It is shown that a class of X states has sudden transition between classical and quantum correlations under decoherence. Our results include the ones in M. D. Lang and C. M. Caves [Phys. Rev. Lett. 105, 150501 (2010)] as a special case and show new pictures and structures of quantum discord.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2011-04-11T04:42:35.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.67.-a",
      "03.65.Ud",
      "03.65.Yz"
    ],
    "keywords": [
      "quantum discord",
      "two-qubit states",
      "parallel nonzero bloch vectors",
      "sudden transition",
      "decoherence"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2011,
      "month": "Feb",
      "volume": 83,
      "number": 2,
      "pages": "022321"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2011PhRvA..83b2321L"
    }
  }
}