折纸超材料中的拓扑泵浦
Topological pumping in origami metamaterials
AI总结：
本文提出通过调节旋转角度并沿合成维度耦合空间调制折纸链，实现拓扑边缘态间的波泵浦，并揭示非线性对 Landau-Zener 隧穿及态局域化的影响。
摘要：
在本研究中，我们提出了一种通过调节旋转角度，在具有空间调制的折纸超材料中实现拓扑泵浦的机制。通过沿一个额外的合成维度耦合空间调制的折纸链，实现了波从一个拓扑边缘态到另一个拓扑边缘态的泵浦，其中通过改变耦合折纸链的数量展示了 Landau-Zener 跃迁。此外，折纸超材料固有的非线性使依赖于激发的 Landau-Zener 隧穿概率成为可能。进一步地，随着非线性增强，拓扑态倾向于以一种令人联想到离散呼吸子的方式局域在若干区域中。我们的发现为折纸超材料中的带间跃迁及相关拓扑泵浦特性铺平了道路。
英文摘要：
In this study, we present a mechanism of topological pumping in origami metamaterials with spatial modulation by tuning the rotation angles. Through coupling spatially modulated origami chains along an additional synthetic dimension, the pumping of waves from one topological edge state to another is achieved, where the Landau-Zener transition is demonstrated by varying the number of coupled origami chains. Besides, the inherent nonlinearity of origami metamaterials enable the excitation-dependent Landau-Zener tunneling probability. Furthermore, with the increase of nonlinearity, the topological states tend to localize in several regions in a way reminiscent of discrete breathers. Our findings pave the way towards inter-band transitions and associated topological pumping features in origami metamaterials.
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