{
  "id": "1402.5395",
  "version": "v3",
  "published": "2014-02-21T19:51:52.000Z",
  "updated": "2014-06-04T18:39:40.000Z",
  "title": "Non-Markovianity through accessible information",
  "authors": [
    "F. F. Fanchini",
    "G. Karpat",
    "B. Çakmak",
    "L. K. Castelano",
    "G. H. Aguilar",
    "O. Jiménez Farías",
    "S. P. Walborn",
    "P. H. Souto Ribeiro",
    "M. C. de Oliveira"
  ],
  "comment": "Final Version",
  "journal": "Phys. Rev. Lett. 112, 210402 (2014)",
  "doi": "10.1103/PhysRevLett.112.210402",
  "categories": [
    "quant-ph"
  ],
  "abstract": "The degree of non-Markovianity of quantum processes has been characterized in several different ways in the recent literature. However, the relationship between the non-Markovian behavior and the flow of information between the system and the environment through an entropic measure has not been yet established. We propose an entanglement-based measure of non-Markovianity by employing the concept of assisted knowledge, where the environment E, acquires information about a system S, by means of its measurement apparatus A. The assisted knowledge, based on the accessible information in terms of von-Neumann entropy, monotonically increases in time for all Markovian quantum processes. We demonstrate that the signatures of non-Markovianity can be captured by the nonmonotonic behaviour of the assisted knowledge. We explore this scenario for a two-level system undergoing a relaxation process, through an experimental implementation using an optical approach that allows full access to the state of the environment.",
  "revisions": [
    {
      "version": "v3",
      "updated": "2014-06-04T18:39:40.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "03.65.Yz",
      "03.65.Ta",
      "03.65.Ud",
      "42.50.Lc"
    ],
    "keywords": [
      "accessible information",
      "non-markovianity",
      "assisted knowledge",
      "markovian quantum processes",
      "environment"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2014,
      "month": "May",
      "volume": 112,
      "number": 21,
      "pages": 210402
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2014PhRvL.112u0402F"
    }
  }
}