Work

Symmetry-Induced Weyl Nodes in Interacting Multi-Terminal Josephson Junctions

Year: 2026

Type: preprint

Abstract: We show that an emergent geometric symmetry generates non-trivial topology in quantum-dot-based multi-terminal Josephson junctions. It confines same-spin Andreev bound state crossings to an analytic one-dimensional manifold of the synthetic Brillouin zone, where interdot coupling selects Weyl nodes of charge $\pm1$ in the singlet sector and doubly degenerate cones of charge $\pm2$ in the doublet sector, at gate-tunable locations. The mechanism yields a spectroscopic detection protocol and a design principle for fabricating devices with non-trivial topological signatures.

Source: arXiv (Cornell University)

DOI: 10.48550/arxiv.2608.21200

Authors: Zalom, Peter, Diniz, Gustavo, Ohnmacht, David Christian, Belzig, Wolfgang

Institutions: Czech Academy of Sciences, FZU - Institute of Physics of the Czech Academy of Sciences, QuTech, University of Konstanz, Delft University of Technology

Topic: Topological Materials and Phenomena

Subfield: Atomic and Molecular Physics, and Optics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: European Commission, Deutscher Akademischer Austauschdienst, Deutsche Forschungsgemeinschaft

Awards: G2559764746, G3810236772, G4396925471, G569207059, SFB 1432: Fluktuationen und Nichtlinearitäten in klassischer und Quantenmaterie jenseits des Gleichgewichts, G7253040719

OpenAlex ID: W7204126817

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