{
  "id": "1207.2036",
  "version": "v4",
  "published": "2012-07-09T13:17:27.000Z",
  "updated": "2013-12-20T05:57:45.000Z",
  "title": "Non-Markovian dynamics in a spin star system: The failure of thermalization",
  "authors": [
    "Zhihai Wang",
    "Yu Guo",
    "D. L. Zhou"
  ],
  "comment": "8 pages",
  "journal": "Eur. Phys. J. D (2013) 67: 218",
  "doi": "10.1140/epjd/e2013-40099-0",
  "categories": [
    "quant-ph"
  ],
  "abstract": "In most cases, a small system weakly interacting with a thermal bath will finally reach the thermal state with the temperature of the bath. We show that this intuitive picture is not always true by a spin star model where non-Markov effect predominates in the whole dynamical process. The spin star system consists a central spin homogeneously interacting with an ensemble of identical noninteracting spins. We find that the correlation time of the bath is infinite, which implies that the bath has a perfect memory, and that the dynamical evolution of the central spin must be non- Markovian. A direct consequence is that the final state of the central spin is not the thermal state equilibrium with the bath, but a steady state which depends on its initial state.",
  "revisions": [
    {
      "version": "v4",
      "updated": "2013-12-20T05:57:45.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "non-markovian dynamics",
      "central spin",
      "spin star system consists",
      "thermalization",
      "spin star model"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "journal": "European Physical Journal D",
      "year": 2013,
      "month": "Nov",
      "volume": 67,
      "number": 11,
      "pages": 218
    },
    "note": {
      "typesetting": "TeX",
      "pages": 8,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2013EPJD...67..218W"
    }
  }
}