论文标题
浮子和异常的浮子Weyl半学
Floquet and Anomalous Floquet Weyl Semimetals
论文作者
论文摘要
量子系统的周期性驾驶可以在静态系统中实现新的拓扑阶段。这提供了通过定期驾驶工程来制备非平衡量子相扎根于非平衡性质的途径。受到拓扑半学的持续兴趣的激励，我们对没有静态的拓扑半学的新颖拓扑阶段感兴趣。我们建议在弱驾驶场的制度中设计非平衡拓扑半学，其中频谱宽度与驱动频率相同。我们识别两种新型的非平衡Weyl半含量（即浮子和异常的浮子Weyl半含量），它们不表现出平衡中的类似物。使用用于控制光学晶格中超低原子的最新技术，该设置在实验上是可行的。
The periodic driving of a quantum system can enable new topological phases without analogs in static systems. This provides a route towards preparing non-equilibrium quantum phases rooted into the non-equilibrium nature by periodic driving engineering. Motivated by the ongoing considerable interest in topological semimetals, we are interested in the novel topological phases in the periodically driven topological semimetals without a static counterpart. We propose to design non-equilibrium topological semimetals in the regime of weakly driving field where the spectrum width of shares the same magnitude with the driving frequency. We identify two novel types of non-equilibrium Weyl semimetals (i.e., Floquet and anomalous Floquet Weyl semimetals) that do not exhibit analogues in equilibrium. The proposed setup is shown to be experimentally feasible using the state-of-the-art techniques used to control ultracold atoms in optical lattices.
