{
  "id": "quant-ph/9805055",
  "version": "v1",
  "published": "1998-05-19T12:15:49.000Z",
  "updated": "1998-05-19T12:15:49.000Z",
  "title": "Information measures and classicality in quantum mechanics",
  "authors": [
    "C. Anastopoulos"
  ],
  "comment": "35 pages, LATEX",
  "journal": "Phys.Rev. D59 (1999) 045001",
  "doi": "10.1103/PhysRevD.59.045001",
  "categories": [
    "quant-ph",
    "gr-qc"
  ],
  "abstract": "We study information measures in quantu mechanics, with particular emphasis on providing a quantification of the notions of classicality and predictability. Our primary tool is the Shannon - Wehrl entropy I. We give a precise criterion for phase space classicality and argue that in view of this a) I provides a measure of the degree of deviation from classicality for closed system b) I - S (S the von Neumann entropy) plays the same role in open systems We examine particular examples in non-relativistic quantum mechanics. Finally, (this being one of our main motivations) we comment on field classicalisation on early universe cosmology.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1998-05-19T12:15:49.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "non-relativistic quantum mechanics",
      "study information measures",
      "von neumann entropy",
      "phase space classicality",
      "precise criterion"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. D"
    },
    "note": {
      "typesetting": "LaTeX",
      "pages": 35,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "inspire": 470721
    }
  }
}