{
  "id": "cond-mat/0111220",
  "version": "v1",
  "published": "2001-11-12T15:41:10.000Z",
  "updated": "2001-11-12T15:41:10.000Z",
  "title": "Dynamics of a large-spin-boson system in the strong coupling regime",
  "authors": [
    "T. Vorrath",
    "T. Brandes",
    "B. Kramer"
  ],
  "comment": "4 pages, 2 figures, to be published in proceedings of MB11",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We investigate collective effects of an ensemble of biased two level systems interacting with a bosonic bath in the strong coupling regime. The two level systems are described by a large pseudo-spin J. An equation for the expectation value M(t) of the z-component of the pseudo spin is derived and solved numerically for an ohmic bath at T=0. In case of a large cut-off frequency of the spectral function, a Markov approximation is justified and an analytical solution is presented. We find that M(t) relaxes towards a highly correlated state with maximum value $\\pm J$ for large times. However, this relaxation is extremely slow for most parameter values so as if the system was \"frozen in\" by interaction with the bosonic bath.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2001-11-12T15:41:10.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "strong coupling regime",
      "large-spin-boson system",
      "level systems",
      "bosonic bath",
      "large cut-off frequency"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}