{
  "id": "1211.5951",
  "version": "v2",
  "published": "2012-11-26T13:45:26.000Z",
  "updated": "2015-01-22T14:53:51.000Z",
  "title": "Counting Statistics and Dephasing Transition in an Electronic Mach-Zehnder Interferometer",
  "authors": [
    "A. Helzel",
    "L. V. Litvin",
    "I. P. Levkivskyi",
    "E. V. Sukhorukov",
    "W. Wegscheider",
    "C. Strunk"
  ],
  "comment": "7 pages, 4 figures (+Supplement 8 pages, 9 figures)",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "It was recently suggested that a novel type of phase transition may occur in the visibility of electronic Mach-Zehnder Interferometers. Here, we present experimental evidence for the existence of this transition. The transition is induced by strongly non-Gaussian noise that originates from the strong coupling of a quantum point contact to the interferometer. We provide a transparent physical picture of the effect, by exploiting a close analogy to the neutrino-oscillations of particle physics. In addition, our experiment constitutes a probe of the singularity of the elusive full counting statistics of a quantum point contact.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-11-26T13:45:26.000Z",
      "title": "Noise-induced Phase Transition in an Electronic Mach-Zehnder Interferometer: a Manifestation of Non-Gaussian Noise",
      "abstract": "An electronic Mach-Zehnder interferometer is employed as a detector for the non-Gaussian current noise emitted from a quantum point contact (QPC). The visibility of Aharonov-Bohm interference in the interferometer constitutes a direct probe of the generator of the full counting statistics (FCS) of the current fluctuations. The visibility shows a lobe and node structure vs. the applied dc bias, which depends on the transmission T of the QPC, and changes qualitatively at T=1/2. The analysis of the data provides direct experimental evidence for a singularity in the FCS. The noise is highly non-Gaussian and leads to an abrupt disappearance of the multiple side lobes for T<1/2. Together with a singularity of the dephasing rate these observations constitute an experimental evidence of a recently predicted noise-induced phase transition occurring at T=1/2.",
      "comment": "6 pages, 4 figures (+Supplement 6 pages, 7 figures)",
      "journal": null,
      "doi": null
    },
    {
      "version": "v2",
      "updated": "2015-01-22T14:53:51.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "electronic mach-zehnder interferometer",
      "non-gaussian noise",
      "noise-induced phase transition occurring",
      "manifestation",
      "multiple side lobes"
    ],
    "note": {
      "typesetting": "TeX",
      "pages": 7,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012arXiv1211.5951H"
    }
  }
}