{
  "id": "cond-mat/9811376",
  "version": "v1",
  "published": "1998-11-26T16:08:34.000Z",
  "updated": "1998-11-26T16:08:34.000Z",
  "title": "Coexistence of long-range order for two observables at finite temperatures",
  "authors": [
    "N. Macris",
    "C. -A. Piguet"
  ],
  "comment": "12 pages, accepted for publication in J. of Phys. A",
  "doi": "10.1088/0305-4470/32/5/007",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "We give a criterion for the simultaneous existence or non existence of two long-range orders for two observables, at finite temperatures, for quantum lattice many body systems. Our analysis extends previous results of G.-S. Tian limited to the ground state of similar models. The proof involves an inequality of Dyson-Lieb-Simon which connects the Duhamel two-point function to the usual correlation function. An application to the special case of the Holstein model is discussed.",
  "revisions": [
    {
      "version": "v1",
      "updated": "1998-11-26T16:08:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "long-range order",
      "finite temperatures",
      "observables",
      "coexistence",
      "usual correlation function"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 12,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}