Topological properties of coupled one-dimensional chains of elastic rotators
Topological properties of coupled one-dimensional chains of elastic rotators
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DOI：
10.1063/5.0041256
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发表时间：
2021-02
影响因子：
3.2
通讯作者：
P. Deymier;K. Runge;M. A. Hasan
中科院分区：
文献类型：
--
作者：
P. Deymier;K. Runge;M. A. Hasan
我们介绍了一个由弹性耦合的一维弹性旋转子链组成的模型系统。转子链类似于弹性的Su-Schrieffer-Heeger模型。理论和数值结果表明，耦合链系统支持大量的拓扑性质，如Dirac简并、能带反转和拓扑跃迁，这些性质是耦合链参数强度的函数，以及耦合链上和耦合链之间模的自由度的不可分离性，类似于多体量子系统中的纠缠Bell态。最后，我们通过允许耦合参数随时间变化来揭示合成维度的形成，这有可能创建更高维的合成空间。
We introduce a model system composed of elastically coupled one-dimensional chains of elastic rotators. The chains of rotators are analogous to elastic Su-Schrieffer–Heeger models. The coupled chain system is shown analytically and numerically to support an unusual number of topological properties such as Dirac degeneracies, band inversion and topological transition as a function of the strength of the parameter coupling the chains, nonseparability of the modes' degrees of freedom along and across the coupled chains that are analogous to entangled Bell states in a multipartite quantum system. Finally, we reveal the formation of a synthetic dimension by allowing the coupling parameter to vary with time, which has the potential to create higher-dimensional synthetic space.