Synthetic mechanical lattices with synthetic interactions
Synthetic mechanical lattices with synthetic interactions
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DOI：
10.1103/physreva.108.012221
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发表时间：
2021-07
影响因子：
2.9
通讯作者：
Ritika Anandwade;Yaashnaa Singhal;Sai Naga Manoj Paladugu;Enrico Martello;Michael Castle;S. Agrawal;Ellen Carlson;Cait Battle-McDonald;T. Ozawa;H. Price;B. Gadway
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作者：
Ritika Anandwade;Yaashnaa Singhal;Sai Naga Manoj Paladugu;Enrico Martello;Michael Castle;S. Agrawal;Ellen Carlson;Cait Battle-McDonald;T. Ozawa;H. Price;B. Gadway
基于机械元件的超材料在过去十年中得到了发展，作为一个强大的平台，用于探索在真实材料中难以生产的奇异状态下的电子传输类似物。除了实现新的物理探索之外，此类发展还有望推进对声学和机械超材料的控制，从而实现控制声音和能量传输的新能力。在这里，我们展示了基于模块化机械元件的实时测量和反馈的高度可调机械超材料的构建模块。我们通过实验设计合成晶格哈密顿量，描述机械系统中机械能（声子）的传输，控制局部位点能量和损耗和增益，以及控制振荡器之间的复杂跳跃，包括对非互易跳跃的自然扩展。除了线性项之外，我们还通过实验演示了这种基于测量的反馈方法如何打开独立引入非线性交互项的窗口。展望未来，合成机械晶格为探索非标准几何、更高维度以及新颖的多体相互作用中的拓扑、非厄米性和非线性动力学相关现象打开了大门。
Metamaterials based on mechanical elements have been developed over the past decade as a powerful platform for exploring analogs of electron transport in exotic regimes that are hard to produce in real materials. In addition to enabling new physics explorations, such developments promise to advance the control over acoustic and mechanical metamaterials, and consequently to enable new capabilities for controlling the transport of sound and energy. Here, we demonstrate the building blocks of highly tunable mechanical metamaterials based on real-time measurement and feedback of modular mechanical elements. We experimentally engineer synthetic lattice Hamiltonians describing the transport of mechanical energy (phonons) in our mechanical system, with control over local site energies and loss and gain as well as control over the complex hopping between oscillators, including a natural extension to non-reciprocal hopping. Beyond linear terms, we experimentally demonstrate how this measurement-based feedback approach opens the window to independently introducing nonlinear interaction terms. Looking forward, synthetic mechanical lattices open the door to exploring phenomena related to topology, non-Hermiticity, and nonlinear dynamics in non-standard geometries, higher dimensions, and with novel multi-body interactions.