{
  "id": "cond-mat/0611580",
  "version": "v1",
  "published": "2006-11-22T11:01:48.000Z",
  "updated": "2006-11-22T11:01:48.000Z",
  "title": "Quantum pump driven fermionic Mach-Zehnder interferometer",
  "authors": [
    "S. -W. V. Chung",
    "M. Moskalets",
    "P. Samuelsson"
  ],
  "comment": "10 pages, 4 figures",
  "journal": "Phys. Rev. B 75, 115332 (2007).",
  "doi": "10.1103/PhysRevB.75.115332",
  "categories": [
    "cond-mat.mes-hall"
  ],
  "abstract": "We have investigated the characteristics of the currents in a pump-driven fermionic Mach-Zehnder interferometer. The system is implemented in a conductor in the quantum Hall regime, with the two interferometer arms enclosing an Aharonov-Bohm flux $\\Phi$. Two quantum point contacts with transparency modulated periodically in time drive the current and act as beam-splitters. The current has a flux dependent part $I^{(\\Phi)}$ as well as a flux independent part $I^{(0)}$. Both current parts show oscillations as a function of frequency on the two scales determined by the lengths of the interferometer arms. In the non-adiabatic, high frequency regime $I^{(\\Phi)}$ oscillates with a constant amplitude while the amplitude of the oscillations of $I^{(0)}$ increases linearly with frequency. The flux independent part $I^{(0)}$ is insensitive to temperature while the flux dependent part $I^{(\\Phi)}$ is exponentially suppressed with increasing temperature. We also find that for low amplitude, adiabatic pumping rectification effects are absent for semitransparent beam-splitters. Inelastic dephasing is introduced by coupling one of the interferometer arms to a voltage probe. For a long charge relaxation time of the voltage probe, giving a constant probe potential, $I^{(\\Phi)}$ and the part of $I^{(0)}$ flowing in the arm connected to the probe are suppressed with increased coupling to the probe. For a short relaxation time, with the potential of the probe adjusting instantaneously to give zero time dependent current at the probe, only $I^{(\\Phi)}$ is suppressed by the coupling to the probe.",
  "revisions": [
    {
      "version": "v1",
      "updated": "2006-11-22T11:01:48.000Z"
    }
  ],
  "analyses": {
    "keywords": [
      "quantum pump driven fermionic mach-zehnder",
      "pump driven fermionic mach-zehnder interferometer",
      "flux dependent part",
      "flux independent part",
      "interferometer arms"
    ],
    "tags": [
      "journal article"
    ],
    "publication": {
      "publisher": "APS",
      "journal": "Phys. Rev. B"
    },
    "note": {
      "typesetting": "TeX",
      "pages": 10,
      "language": "en",
      "license": "arXiv",
      "status": "editable"
    }
  }
}