{
  "id": "cond-mat/0505279",
  "version": "v1",
  "published": "2005-05-11T10:37:34.000Z",
  "updated": "2005-05-11T10:37:34.000Z",
  "title": "A simulation study of energy transport in the Hamiltonian XY-model",
  "authors": [
    "Luca Delfini",
    "Stefano Lepri",
    "Roberto Livi"
  ],
  "comment": "Submitted to Journal of Statistical Mechanics: theory and experiment",
  "doi": "10.1088/1742-5468/2005/05/P05006",
  "categories": [
    "cond-mat.stat-mech"
  ],
  "abstract": "The transport properties of the planar rotator model on a square lattice are analyzed by means of microcanonical and non--equilibrium simulations. Well below the Kosterlitz--Thouless--Berezinskii transition temperature, both approaches consistently indicate that the energy current autocorrelation displays a long--time tail decaying as t^{-1}. This yields a thermal conductivity coefficient which diverges logarithmically with the lattice size. Conversely, conductivity is found to be finite in the high--temperature disordered phase. Simulations close to the transition temperature are insted limited by slow convergence that is presumably due to the slow kinetics of vortex pairs.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2005-05-11T10:37:34.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "simulation study",
      "energy transport",
      "hamiltonian xy-model",
      "energy current autocorrelation displays",
      "planar rotator model"
    ],
    "tags": [
      "journal article"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}