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

• URL: http://arxiv.org/abs/2311.11040v1
• Date: Sat, 18 Nov 2023 11:26:56 GMT
• Title: Observation of a Topological Phase Transition in Random Coaxial Cable Structures with Chiral Symmetry
• Abstract summary: We report an experimental study of the disordered Su-Schrieffer-Heeger (SSH) model, implemented in a system of coaxial cables. We demonstrate the presence of a topologically protected state, with frequency variation of less than 0.2% over the ensemble.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• 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.

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