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arXiv · 1712.03850

Dynamics and Hall-edge-state mixing of localized electrons in a two-channel Mach-Zehnder interferometer

Laura Bellentani·Andrea Beggi·Paolo Bordone·Andrea Bertoni
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Abstract

We present a numerical study of a multichannel electronic Mach-Zehnder interferometer, based on magnetically-driven non-interacting edge states. The electron path is defined by a full-scale potential landscape on the two-dimensional electron gas at filling factor two, assuming initially only the first Landau level as filled. We tailor the two beam splitters with 50% interchannel mixing and measure Aharonov-Bohm oscillations in the transmission probability of the second channel. We perform time-dependent simulations by solving the electron Schroedinger equation through a parallel implementation of the split-step Fourier method and we describe the charge-carrier wave function as a Gaussian wave packet of edge states. We finally develop a simplified theoretical model to explain the features observed in the transmission probability and propose possible strategies to optimize gate performances.

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Laura Bellentani, Andrea Beggi, Paolo Bordone, Andrea Bertoni. 2018-05-04. Dynamics and Hall-edge-state mixing of localized electrons in a two-channel Mach-Zehnder interferometer. https://doi.org/10.1103/physrevb.97.205419

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