论文标题
用电路探索五个维度的拓扑相过渡和weyl物理
Exploring topological phase transition andWeyl physics in five dimensions with electric circuits
论文作者
论文摘要
Weyl Semimetals是物质的阶段，其无间隙电子激发受拓扑和对称性保护。它们的属性取决于系统的尺寸。从理论上讲，五维（5D）Weyl半学在拓扑相跃迁期间以与三维情况类似的方式出现了新的阶段。但是，对这种现象的实验观察仍然是一个巨大的挑战，因为可调的5D系统在真实空间中极难构建。在这里，我们在完全真实的空间中构建5D电路平台，并在实验中观察到五个维度的拓扑相变。不仅是通过实验观察到的杨单极和连接的Weyl表面，而且还证明了五个维度的各种相变，例如从正常绝缘体到Twoweyl表面的HOPF链路的相变，然后是5D拓扑绝缘子。所展示的拓扑相变为五个维度，利用了高维Weyl物理学的概念来控制工程电路中的电信号。
Weyl semimetals are phases of matter with gapless electronic excitations that are protected by topology and symmetry. Their properties depend on the dimensions of the systems. It has been theoretically demonstrated that five-dimensional (5D) Weyl semimetals emerge as novel phases during the topological phase transition in analogy to the three-dimensional case. However, experimental observation of such a phenomenon remains a great challenge because the tunable 5D system is extremely hard to construct in real space. Here, we construct 5D electric circuit platforms in fully real space and experimentally observe topological phase transitions in five dimensions. Not only are Yang monopoles and linked Weyl surfaces observed experimentally, but various phase transitions in five dimensions are also proved, such as the phase transitions from a normal insulator to a Hopf link of twoWeyl surfaces and then to a 5D topological insulator. The demonstrated topological phase transitions in five dimensions leverage the concept of higher-dimensional Weyl physics to control electrical signals in the engineered circuits.
