{
  "id": "0805.0962",
  "version": "v2",
  "published": "2008-05-07T11:48:07.000Z",
  "updated": "2008-06-25T18:15:16.000Z",
  "title": "Decoherence by Quantum Telegraph Noise",
  "authors": [
    "Benjamin Abel",
    "Florian Marquardt"
  ],
  "comment": "5 pages, 5 figures, added references",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We investigate the time-evolution of a charge qubit subject to quantum telegraph noise produced by a single electronic defect level. We obtain results for the time-evolution of the coherence that are strikingly different from the usual case of a harmonic oscillator bath (Gaussian noise). When the coupling strength crosses a certain temperature-dependent threshold, we observe coherence oscillations in the strong-coupling regime. Moreover, we present the time-evolution of the echo signal in a spin-echo experiment. Our analysis relies on a numerical evaluation of the exact solution for the density matrix of the qubit.",
  "revisions": [
    {
      "version": "v2",
      "updated": "2008-06-25T18:15:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "decoherence",
      "single electronic defect level",
      "time-evolution",
      "harmonic oscillator bath",
      "charge qubit subject"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2008arXiv0805.0962A"
    }
  }
}