{
  "id": "quant-ph/0303027",
  "version": "v1",
  "published": "2003-03-05T17:00:50.000Z",
  "updated": "2003-03-05T17:00:50.000Z",
  "title": "About non-positive evolutions in open system dynamics",
  "authors": [
    "F. Benatti",
    "R. Floreanini",
    "M. Piani"
  ],
  "comment": "13 pages, plain-TeX",
  "doi": "10.1103/PhysRevA.67.042110",
  "categories": [
    "quant-ph"
  ],
  "abstract": "The long-time evolution of a system in interaction with an external environment is usually described by a family of linear maps g_t, generated by master equations of Block-Redfield type. These maps are in general non-positive; a widely adopted cure for this physical inconsistency is to restrict the domain of definition of the dynamical maps to those states for which g_t remains positive. We show that this prescription has to be modified when two systems are immersed in the same environment and evolve with the factorized dynamics g_t x g_t starting from an entangled initial state.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2003-03-05T17:00:50.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "open system dynamics",
      "non-positive evolutions",
      "entangled initial state",
      "block-redfield type",
      "external environment"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. A"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 13,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}