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    Non-Abelian braiding in Stampfli-type quasicrystals

    Keran Hu1, Aoqian Shi1, Linsheng Bao1, Shilong Li1, Shuangchun Wen1, and Jianjun Liu1,2,*

    • 1Key Laboratory for Micro/Nano Optoelectronic Devices of Ministry of Education, School of Physics and Electronics, Hunan University, Changsha 410082, China
    • 2Greater Bay Area Institute for Innovation, Hunan University, Guangzhou 511300, China

    • *Contact author: jianjun.liu@hnu.edu.cn

    Phys. Rev. A 112, 043510 – Published 9 October, 2025

    DOI: https://doi.org/10.1103/xwx2-lbpg

    Abstract

    Non-Abelian braiding, as a promising approach for topological quantum computation, is typically based on topologically protected quantum gates. However, existing braiding schemes have primarily focused on arrays constructed from periodic lattices, which provide limited types of quantum gates and lack flexibility in braiding path design. In this work, we propose two structurally distinct X junctions based on a one-dimensional single-particle tight-binding model, and present a braiding protocol that yields a topologically protected X gate by adiabatically moving defects. The two proposed X junctions are introduced into the Stampfli-type quasicrystal, and each is successfully used to demonstrate non-Abelian braiding. Our braiding scheme allows for multimode braiding and flexible path design, providing a novel approach for designing non-Abelian devices in optical and acoustic platforms.

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