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Electronic Dephasing in the Quantum Hall Regime

Fromer, N. A. ; Schüller, Christian ; Chemla, D. S. ; Shahbazyan, T. V. ; Perakis, I. E. ; Maranowski, K. ; Gossard, A. C.
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Date of publication of this fulltext: 21 Sep 2009 07:19


Abstract

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 ...

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