Reflectionless modes as a source of Weyl nodes in multiterminal Josephson junctions Article Swipe

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David Christian Ohnmacht , Valentin Wilhelm , Wolfgang Belzig ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2503.10874

Multiterminal Josephson junctions are a promising platform to study non-trivial topology in engineered quantum systems. Yet, experimentally meaningful insight into what exactly makes these systems topologically non-trivial remains elusive. In this work, we show that zero energy reflectionless scattering modes (RSMs) of the normal scattering matrix result in topological phase boundaries. By analyzing two different setups, we explain the origin of each topological phase boundary and furthermore provide generalizable insight into these systems. The considerations here can be of help for experimentalists as it connects the properties of the normal scattering region to the Andreev bound state spectrum of superconducting junctions in a multiterminal setup.

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Type: preprint
Language: en
Landing Page: http://arxiv.org/abs/2503.10874
PDF: https://arxiv.org/pdf/2503.10874
OA Status: green
OpenAlex ID: https://openalex.org/W4416017131

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OpenAlex ID: https://openalex.org/W4416017131

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DOI: https://doi.org/10.48550/arxiv.2503.10874

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Title: Reflectionless modes as a source of Weyl nodes in multiterminal Josephson junctions

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Type: preprint

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Language: en

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Publication year: 2025

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Publication date: 2025-03-13

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Authors: David Christian Ohnmacht, Valentin Wilhelm, Wolfgang Belzig

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Landing page: https://arxiv.org/abs/2503.10874

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PDF URL: https://arxiv.org/pdf/2503.10874

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Open access: Yes

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OA status: green

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OA URL: https://arxiv.org/pdf/2503.10874

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Cited by: 0

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