Observation of a Topological Phase Transition in Random Coaxial Cable Structures with Chiral Symmetry
cond-mat.dis-nn, quant-ph
Submitted: 2023-11-18
Updated: 2026-09-16
Journal ref: Phys. Rev. B 114, 144203 (2026)
DOI: 10.1103/hnqs-xh69
License: http://creativecommons.org/licenses/by/4.0/
The gist: 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.
Terminology
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.
Sources
- Photonic lattices of coaxial cables: flat bands and artificial magnetic fields
- Topological Protection in Disordered Photonic Multilayers and Transmission Lines
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