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Decoherence and single electron charging in an electronic Mach-Zehnder interferometer

L. V. Litvin·H. -P. Tranitz·W. Wegscheider·C. Strunk
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Abstract

We investigate the temperature and voltage dependence of the quantum interference in an electronic Mach-Zehnder interferometer using edge channels in the integer quantum-Hall-regime. The amplitude of the interference fringes is significantly smaller than expected from theory; nevertheless the functional dependence of the visibility on temperature and bias voltage agrees very well with theoretical predictions. Superimposed on the Aharonov-Bohm (AB) oscillations, a conductance oscillation with six times smaller period is observed. The latter depends only on gate voltage and not on the AB-phase, and may be related to single electron charging.

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L. V. Litvin, H. -P. Tranitz, W. Wegscheider, C. Strunk. 2006-08-01. Decoherence and single electron charging in an electronic Mach-Zehnder interferometer. https://doi.org/10.1103/physrevb.75.033315

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