Electronic dephasing in the quantum hall regime

Academic Article


  • By means of degenerate four-wave mixing (FWM), we investigate the quantum coherence of electron-hole pairs in the presence of a two-dimensional electron gas in modulation-doped GaAs-AlGaAs quantum wells in the quantum Hall effect regime. With increasing magnetic field, we observe a crossover from Markovian to non-Markovian behavior, as well as large jumps in the decay time of the FWM signal at even Landau level filling factors. The main observations can be qualitatively reproduced by a model which takes into account scattering by the collective excitations of the two-dimensional electron gas. © 1999 The American Physical Society.
  • Authors

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    Digital Object Identifier (doi)

    Author List

  • Fromer NA; Schüller C; Chemla DS; Shahbazyan TV; Perakis IE; Maranowski K; Gossard AC
  • Start Page

  • 4646
  • End Page

  • 4649
  • Volume

  • 83
  • Issue

  • 22