论文标题
通过自我振荡，拓扑边缘状态的耗散性非平衡同步
Dissipative nonequilibrium synchronization of topological edge states via self-oscillation
论文作者
论文摘要
在驾驶和耗散的影响下，同步和拓扑带结构与对称的MIDGAP状态的相互作用在很大程度上没有探索。在这里，我们考虑了一个电子班车的三聚体链，每个班车由一个谐波振荡器组成，该谐波振荡器耦合到位于两个电子铅之间的量子点。每次航天飞机都会受到热耗散的影响，如果由导线之间的偏置电压驱动，则朝着稳定的极限循环进行分叉。通过将振荡器机械耦合在一起，我们观察到链末端的同步运动，可以使用线性稳定性分析来解释。由于三聚体链的反转对称性，这些同步状态在拓扑上受到局部疾病的保护。此外，通过当前的实验性可行性，可以通过测量每次航天飞机的点占用来观察同步运动。我们的结果为通过利用拓扑来增强同步运动的鲁棒性开辟了新的途径。
The interplay of synchronization and topological band structures with symmetry protected midgap states under the influence of driving and dissipation is largely unexplored. Here we consider a trimer chain of electron shuttles, each consisting of a harmonic oscillator coupled to a quantum dot positioned between two electronic leads. Each shuttle is subject to thermal dissipation and undergoes a bifurcation towards self-oscillation with a stable limit cycle if driven by a bias voltage between the leads. By mechanically coupling the oscillators together, we observe synchronized motion at the ends of the chain, which can be explained using a linear stability analysis. Due to the inversion symmetry of the trimer chain, these synchronized states are topologically protected against local disorder. Furthermore, with current experimental feasibility, the synchronized motion can be observed by measuring the dot occupation of each shuttle. Our results open a new avenue to enhance the robustness of synchronized motion by exploiting topology.
