Probe-configuration dependent dephasing in a mesoscopic interferometer

  title={Probe-configuration dependent dephasing in a mesoscopic interferometer},
  author={Georg Seelig and Sebastian Pilgram and Andrew N. Jordan and Markus Buttiker},
  journal={Physical Review B},
Dephasing in a ballistic four-terminal Aharonov-Bohm geometry due to charge and voltage fluctuations is investigated. Treating two terminals as voltage probes, we find a strong dependence of the dephasing rate on the probe configuration in agreement with a recent experiment by Kobayashi et al. (J. Phys. Soc. Jpn. 71, 2094 (2002)). Voltage fluctuations in the measurement circuit are shown to be the source of the configuration dependence. 

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