{
  "id": "1302.1985",
  "version": "v1",
  "published": "2013-02-08T10:32:25.000Z",
  "updated": "2013-02-08T10:32:25.000Z",
  "title": "Comparison of quantum and classical relaxation in spin dynamics",
  "authors": [
    "R. Wieser"
  ],
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "The classical Landau-Lifshitz equation with damping term has been derived from the time evolution of a quantum mechanical wave function under the assumption of a non-hermitian Hamilton operator. Further, the trajectory of a classical spin $\\mathrm{S}$ has been compared with the expectation value of the spin operator $\\mathrm{\\hat{S}}$. A good agreement between classical and quantum mechanical trajectories can be found for Hamiltonians linear in $\\mathrm{\\hat{S}}$ respectively $\\mathrm{S}$. Quadratic or higher order terms in the Hamiltonian result in a disagreement.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2013-02-08T10:32:25.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "75.78.-n",
      "75.10.Jm",
      "75.10.Hk"
    ],
    "keywords": [
      "spin dynamics",
      "classical relaxation",
      "comparison",
      "quantum mechanical wave function",
      "non-hermitian hamilton operator"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "doi": "10.1103/PhysRevLett.110.147201",
      "journal": "Physical Review Letters",
      "year": 2013,
      "month": "Apr",
      "volume": 110,
      "number": 14,
      "pages": 147201
    },
    "note": {
      "typesetting": "TeX",
      "pages": 0,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013PhRvL.110n7201W"
    }
  }
}