Observation of a Topological Phase Transition in Random Coaxial Cable Structures with Chiral Symmetry

Abstract:We report an experimental study of the disordered Su-Schrieffer-Heeger (SSH) model, implemented in a system of coaxial cables, whose radio frequency properties map on to the SSH Hamiltonian. By measuring multiple chains with random hopping terms, we demonstrate the presence of a topologically protected state, with frequency variation of less than 0.2% over the ensemble. Connecting the ends of the chains to form loops, we observe a topological phase transition, characterised by the closure of the band gap and the appearance of states which are delocalised, despite the strong disorder.

Disordered Systems and Neural Networks (cond-mat.dis-nn); Quantum Physics (quant-ph)

arXiv:2311.11040 [cond-mat.dis-nn]

(or arXiv:2311.11040v2 [cond-mat.dis-nn] for this version)

https://doi.org/10.48550/arXiv.2311.11040 Focus to learn more arXiv-issued DOI via DataCite

Phys. Rev. B 114, 144203 (2026)

https://doi.org/10.1103/hnqs-xh69 Focus to learn more DOI(s) linking to related resources

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