A Thouless pump can be regarded as a dynamical version of the integer quantum Hall effect. In a finite-size configuration, such a topological pump displays edge modes that emerge dynamically from one bulk band and dive into the opposite bulk band, an effect that can be reproduced with both quantum and classical systems. Here, we report the first unassisted dynamic energy transfer across a metamaterial, via pumping of such topological edge modes. The system is a topological aperiodic acoustic crystal, with a phason that can be fast and periodically driven in adiabatic cycles. When one edge of the metamaterial is excited in a topological forbidden range of frequencies, a microphone placed at the other edge starts to pick up a signal as soon as the pumping process is set in motion. In contrast, the microphone picks no signal when the forbidden range of frequencies is nontopological.

中文翻译：

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跨不对称双层声学超材料的动态拓扑泵送的实验演示

Thouless泵可以看作是整数量子霍尔效应的动态形式。在有限大小的配置中，这种拓扑泵显示从一个体带动态出现并潜入相反的体带的边缘模式，这种效果可以用量子系统和经典系统重现。在这里，我们报告了通过这种拓扑边缘模式的抽运，在超材料上的首次无辅助动态能量转移。该系统是拓扑非周期性声晶体，其相位可在绝热循环中快速且周期性地驱动。当超材料的一个边沿在拓扑禁止的频率范围内被激发时，放置在泵送过程中的另一边的麦克风就会开始拾取信号。相反，