{
  "id": "1101.3408",
  "version": "v3",
  "published": "2011-01-18T09:13:47.000Z",
  "updated": "2011-06-01T10:17:46.000Z",
  "title": "Geometric measure of quantum discord over two-sided projective measurements",
  "authors": [
    "Jianwei Xu"
  ],
  "categories": [
    "quant-ph"
  ],
  "abstract": "The original definition of quantum discord of bipartite states was defined over one-sided projective measurements, it describes quantum correlation more extensively than entanglement. Dakic, Vedral, and Brukner [Phys. Rev. Lett. 105 (2010) 190502] introduced a geometric measure for this quantum discord, and Luo, Fu [Phys. Rev. A 82 (2010) 034302] simplified the variation expression of it. In this paper we introduce a geometric measure for the quantum discord over two-sided projective measurements. A simplified expression and a lower bound of this geometric measure are derived and explicit expressions are obtained for some special cases.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2011-06-01T10:17:46.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum discord",
      "geometric measure",
      "two-sided projective measurements",
      "original definition",
      "bipartite states"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1016/j.physleta.2011.10.072",
      "journal": "Physics Letters A",
      "year": 2012,
      "month": "Jan",
      "volume": 376,
      "number": 4,
      "pages": 320
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhLA..376..320X"
    }
  }
}