{
  "id": "1012.5395",
  "version": "v2",
  "published": "2010-12-24T12:53:03.000Z",
  "updated": "2011-02-01T14:41:44.000Z",
  "title": "Decoherence of the two-level system coupled to a fermionic reservoir and the information transfer from it to the environment",
  "authors": [
    "Pei Wang"
  ],
  "comment": "3 pages, 2 figures",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "We study the evolution of reduced density matrix of an impurity coupled to a Fermi sea after the coupling is switched on at time $t=0$. We find the non-diagonal elements of the reduced density matrix decay exponentially, and the decay constant is the impurity level width $\\Gamma$. And we study the information transfer rate between the impurity and the Fermi sea, which also decays exponentially. And the decay constant is $k\\Gamma$ with $k=2\\sim 4$. Our results reveal the relation between information transfer rate and decoherence rate.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2011-02-01T14:41:44.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "two-level system",
      "fermionic reservoir",
      "density matrix decay",
      "information transfer rate",
      "decoherence"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 3,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2010arXiv1012.5395W"
    }
  }
}