{
  "id": "1202.3591",
  "version": "v1",
  "published": "2012-02-16T13:55:58.000Z",
  "updated": "2012-02-16T13:55:58.000Z",
  "title": "Quantum coherence engineering in the integer quantum Hall regime",
  "authors": [
    "P-A. Huynh",
    "F. Portier",
    "H. le Sueur",
    "G. Faini",
    "U. Gennser",
    "D. Mailly",
    "F. Pierre",
    "W. Wegscheider",
    "P. Roche"
  ],
  "comment": "4 pages, 5 figures",
  "journal": "Phys. Rev. Lett. 108, 256802 (2012)",
  "doi": "10.1103/PhysRevLett.108.256802",
  "categories": [
    "cond-mat.mes-hall",
    "quant-ph"
  ],
  "abstract": "We present an experiment where the quantum coherence in the edge states of the integer quantum Hall regime is tuned with a decoupling gate. The coherence length is determined by measuring the visibility of quantum interferences in a Mach-Zehnder interferometer as a function of temperature, in the quantum Hall regime at filling factor two. The temperature dependence of the coherence length can be varied by a factor of two. The strengthening of the phase coherence at finite temperature is shown to arise from a reduction of the coupling between co-propagating edge states. This opens the way for a strong improvement of the phase coherence of Quantum Hall systems. The decoupling gate also allows us to investigate how inter-edge state coupling influence the quantum interferences' dependence on the injection bias. We find that the finite bias visibility can be decomposed into two contributions: a Gaussian envelop which is surprisingly insensitive to the coupling, and a beating component which, on the contrary, is strongly affected by the coupling.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2012-02-16T13:55:58.000Z"
    }
  ],
  "analyses": {
    "subjects": [
      "73.43.Fj",
      "03.65.Yz",
      "73.23.Ad"
    ],
    "keywords": [
      "integer quantum hall regime",
      "quantum coherence engineering",
      "coherence length",
      "edge states",
      "quantum interferences"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Physical Review Letters",
      "year": 2012,
      "month": "Jun",
      "volume": 108,
      "number": 25,
      "pages": 256802
    },
    "note": {
      "typesetting": "TeX",
      "pages": 4,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2012PhRvL.108y6802H"
    }
  }
}