{
  "id": "cond-mat/0402099",
  "version": "v1",
  "published": "2004-02-03T20:48:16.000Z",
  "updated": "2004-02-03T20:48:16.000Z",
  "title": "Effects of dephasing on shot-noise in an electronic Mach-Zehnder interferometer",
  "authors": [
    "Florian Marquardt",
    "C. Bruder"
  ],
  "comment": "18 pages, 8 figures. A brief version is contained in cond-mat/0306504",
  "journal": "Phys. Rev. B 70, 125305 (2004)",
  "doi": "10.1103/PhysRevB.70.125305",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We present a theoretical study of the influence of dephasing on shot noise in an electronic Mach-Zehnder interferometer. In contrast to phenomenological approaches, we employ a microscopic model where dephasing is induced by the fluctuations of a classical potential. This enables us to treat the influence of the environment's fluctuation spectrum on the shot noise. We compare against the results obtained from a simple classical model of incoherent transport, as well as those derived from the phenomenological dephasing terminal approach, arguing that the latter runs into a problem when applied to shot noise calculations for interferometer geometries. From our model, we find two different limiting regimes: If the fluctuations are slow as compared to the time-scales set by voltage and temperature, the usual partition noise expression T(1-T) is averaged over the fluctuating phase difference. For the case of ``fast'' fluctuations, it is replaced by a more complicated expression involving an average over transmission amplitudes. The full current noise also contains other contributions, and we provide a general formula, as well as explicit expressions and plots for specific examples.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2004-02-03T20:48:16.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "electronic mach-zehnder interferometer",
      "usual partition noise expression",
      "shot-noise",
      "shot noise calculations",
      "full current noise"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 18,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}