{
  "id": "cond-mat/0104558",
  "version": "v1",
  "published": "2001-04-28T11:30:26.000Z",
  "updated": "2001-04-28T11:30:26.000Z",
  "title": "Can backscattering off an impurity enhance the current?",
  "authors": [
    "D. E. Feldman",
    "Yuval Gefen"
  ],
  "comment": "5 pages, Revtex",
  "categories": [
    "cond-mat.mes-hall",
    "cond-mat.str-el"
  ],
  "abstract": "It is well known that while forward scattering has no effect on the conductance of one-dimensional systems, backscattering off a static impurity suppresses the current. We study the effect of a time-dependent point impurity on the conductance of a one-channel quantum wire. At strong repulsive interaction (Luttinger liquid parameter g<1/2), backscattering renders the conductance greater than its value e^2/h in the absence of the impurity. A possible experimental realization of our model is a constricted Hall bar at fractional filling factors \\nu=1/(2n+1) with a time-dependent voltage at the constriction.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2001-04-28T11:30:26.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "impurity enhance",
      "backscattering",
      "static impurity suppresses",
      "time-dependent point impurity",
      "one-channel quantum wire"
    ],
    "note": {
      "typesetting": "RevTeX",
      "pages": 5,
      "language": "en",
      "license": "arXiv",
      "status": "editable",
      "adsabs": "2001cond.mat..4558F"
    }
  }
}