Gate-tunable phase transition in a bosonic Su-Schrieffer-Heeger chain

• URL: http://arxiv.org/abs/2404.07371v1
• Date: Wed, 10 Apr 2024 22:03:32 GMT
• Title: Gate-tunable phase transition in a bosonic Su-Schrieffer-Heeger chain
• Authors: Lukas Johannes Splitthoff, Miguel Carrera Belo, Guliuxin Jin, Yu Li, Eliska Greplova, Christian Kraglund Andersen,
• Abstract summary: Su-Schrieffer-Heeger model has gained prominence due to its simplicity and practical applications. We present the implementation of a gate-tunable, five-unit-cell bosonic SSH chain on a one-dimensional lattice of superconducting resonators. In contrast to prior work, our approach offers precise and independent in-situ tuning of the coupling parameters.
• Score: 9.290206579136372
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Metamaterials engineered to host topological states of matter in controllable quantum systems hold promise for the advancement of quantum simulations and quantum computing technologies. In this context, the Su-Schrieffer-Heeger (SSH) model has gained prominence due to its simplicity and practical applications. Here, we present the implementation of a gate-tunable, five-unit-cell bosonic SSH chain on a one-dimensional lattice of superconducting resonators. We achieve electrostatic control over the inductive intra-cell coupling using semiconductor nanowire junctions, which enables the spectroscopic observation of a transition from a trivial to a topological phase in the engineered metamaterial. In contrast to prior work, our approach offers precise and independent in-situ tuning of the coupling parameters. Finally, we discuss the robustness of the topological edge state against various disorder realizations. Our results supplement efforts towards gate-controlled superconducting electronics and large controllable bosonic lattices to enable quantum simulations.

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