Theoretical, numerical, and experimental study of a flying gubit electronic interferometer

We discuss an electronic interferometer recently measured by Yamamoto et al. This "flying quantum bit" experiment showed quantum oscillations between electronic trajectories of two tunnel-coupled wires connected via an Aharanov-Bohm ring. We present a simple scattering model as well as a n...

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Published in:Physical review. B, Condensed matter and materials physics Condensed matter and materials physics, 2014-03, Vol.89 (12)
Main Authors: Bautze, Tobias, Sussmeier, Christoph, Takada, Shintaro, Groth, Christoph, Meunier, Tristan, Yamamoto, Michihisa, Tarucha, Seigo, Waintal, Xavier, Bauerle, Christopher
Format: Article
Language:English
Subjects:
Computer simulation
Condensed matter
Electronics
Flight
Flying
Interferometers
Mathematical models
Oscillations
Qubits (quantum computing)
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container_issue 12
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container_title Physical review. B, Condensed matter and materials physics
container_volume 89
creator Bautze, Tobias
Sussmeier, Christoph
Takada, Shintaro
Groth, Christoph
Meunier, Tristan
Yamamoto, Michihisa
Tarucha, Seigo
Waintal, Xavier
Bauerle, Christopher
description We discuss an electronic interferometer recently measured by Yamamoto et al. This "flying quantum bit" experiment showed quantum oscillations between electronic trajectories of two tunnel-coupled wires connected via an Aharanov-Bohm ring. We present a simple scattering model as well as a numerical microscopic model to describe this experiment. In addition, we present experimental data to which we confront our numerical results. While our analytical model provides basic concepts for designing the flying qubit device, we find that our numerical simulations allow us to reproduce detailed features of the transport measurements such as in-phase and antiphase oscillations of the two output currents as well as a smooth phase shift when sweeping a side gate. Furthermore, we find remarkable resemblance for the magnetoconductance oscillations in both conductance and visibility between simulations and experiments within a specific parameter range.
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source American Physical Society:Jisc Collections:APS Read and Publish 2023-2025 (reading list)
subjects Computer simulation
Condensed matter
Electronics
Flight
Flying
Interferometers
Mathematical models
Oscillations
Qubits (quantum computing)
title Theoretical, numerical, and experimental study of a flying gubit electronic interferometer
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