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Charge fluctuation induced dephasing in a gated mesoscopic interferometer

Publication date2001
Abstract

The reduction of the amplitude of Aharonov-Bohm oscillations in a ballistic one-channel mesoscopic interferometer due to charge fluctuations is investigated. In the arrangement considered the interferometer has four terminals and is coupled to macroscopic metallic side-gates. The Aharonov-Bohm oscillation amplitude is calculated as a function of temperature and the strength of coupling between the ring and the side-gates. The resulting dephasing rate is linear in temperature in agreement with recent experiments. Our derivation emphasizes the relationship between dephasing, ac-transport and charge fluctuations.

Keywords
  • Mesoscopic systems and quantum hall effect
  • Condensed matter
Citation (ISO format)
SEELIG, Georg, BUTTIKER, Markus. Charge fluctuation induced dephasing in a gated mesoscopic interferometer. In: Physical review. B, Condensed matter and materials physics, 2001, vol. 64, n° 24, p. 245313. doi: 10.1103/PhysRevB.64.245313
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ISSN of the journal1098-0121
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