{
  "id": "1203.2347",
  "version": "v3",
  "published": "2012-03-11T16:20:06.000Z",
  "updated": "2012-05-18T07:48:53.000Z",
  "title": "Quantum discord and non-Markovianity of quantum dynamics",
  "authors": [
    "S. Alipour",
    "A. Mani",
    "A. T. Rezakhani"
  ],
  "comment": "5 pages, 3 figures",
  "journal": "Phys. Rev. A 85, 052108 (2012)",
  "doi": "10.1103/PhysRevA.85.052108",
  "categories": [
    "quant-ph",
    "math-ph",
    "math.MP"
  ],
  "abstract": "The problem of recognizing (non-)Markovianity of a quantum dynamics is revisited through analyzing quantum correlations. We argue that instantaneously-vanishing quantum discord provides a necessary and sufficient condition for Markovianity of a quantum map. This is used to introduce a measure of non-Markovianity. This measure, however, requires demanding knowledge about the system and the environment. By using a quantum correlation monogamy property and an ancillary system, we propose a simplified measure with less requirements. Non-Markovianity is thereby decided by quantum state tomography of the system and the ancilla.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2012-05-18T07:48:53.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.65.Ud",
      "03.65.Yz",
      "03.67.Bg",
      "03.67.Mn"
    ],
    "keywords": [
      "quantum dynamics",
      "non-markovianity",
      "quantum correlation monogamy property",
      "quantum state tomography",
      "analyzing quantum correlations"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review A",
      "year": 2012,
      "month": "May",
      "volume": 85,
      "number": 5,
      "pages": "052108"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvA..85e2108A"
    }
  }
}