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

被引:8
|
作者
Bellentani, Laura [1 ]
Beggi, Andrea [1 ]
Bordone, Paolo [1 ,2 ]
Bertoni, Andrea [2 ]
机构
[1] Univ Modena & Reggio Emilia, Dipartimento Sci Fis Informat & Matemat, Via Campi 213-A, I-41125 Modena, Italy
[2] CNR, Ist Nanosci, S3, Via Campi 213-A, I-41125 Modena, Italy
关键词
INDEPENDENT SOURCES; MAGNETIC-FIELDS; EFFECT REGIME; QUANTUM;
D O I
10.1103/PhysRevB.97.205419
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
We present a numerical study of a multichannel electronic Mach-Zehnder interferometer, based on magnetically driven noninteracting edge states. The electron path is defined by a full-scale potential landscape on the two-dimensional electron gas at filling factor 2, assuming initially only the first Landau level as filled. We tailor the two beamsplitters 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 Schrodinger 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 we propose possible strategies to optimize gate performances.
引用
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页数:11
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