论文标题
Landau-Zener在拓扑声学中的过渡
Landau-Zener Transition in Topological Acoustic Pumping
论文作者
论文摘要
量化电荷泵送是一种强大的绝热现象，在拓扑非平凡的系统中独特存在。这种拓扑抽水不仅为拓扑保护下的国家的演变带来了基本见解，而且为研究高维拓扑阶段的研究提供了至关重要的方法。在这项工作中，我们通过显示拓扑边界状态（TBS）的成功泵到相反边缘的成功泵送，展示了声学波导系统中的拓扑泵送。通过探索两个TBS谱带之间的有限大小诱导的迷你差异，我们通过证明具有理论和实验的Landau-Zener转变，推出了系统中绝热性的定量条件。我们的结果不仅为未来的拓扑声学研究开辟了新的途径，而且还建立了非绝热的过渡，作为操纵拓扑状态的新自由度。
Quantized charge pumping is a robust adiabatic phenomenon uniquely existing in topologically nontrivial systems. Such topological pumping not only brings fundamental insights to the evolution of states under the protection of topology but also provides a vital approach for the study of higher-dimensional topological phases. In this work, we demonstrate topological pumping in an acoustic waveguide system by showing the successful pumping of topological boundary states (TBSs) across the bulk to the opposite edge. By exploring the finite-size induced mini-gap between two TBS bands, we unveil the quantitative condition for the breakdown of adiabaticity in the system by demonstrating the Landau-Zener transition with both theory and experiments. Our results not only open a new route for future investigations of topological acoustics but also establish non-adiabatic transitions as a new degree of freedom for manipulating topological states.
