Phys. Rev. B 68, 161310(R) (2003) [4 pages]Probe-configuration-dependent dephasing in a mesoscopic interferometer
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, Aikawa, Katsumoto, and Iye [J. Phys. Soc. Jpn. 71, 2094 (2002)]. Voltage fluctuations in the measurement circuit are shown to be the source of the configuration dependence. © 2003 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevB.68.161310
DOI:
10.1103/PhysRevB.68.161310
PACS:
73.23.Ad, 72.70.+m, 03.65.Yz
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