具有拓扑带的动态光学超晶格
Dynamic Optical Superlattices with Topological Bands
摘要：
本文介绍了一种通过设计本征时间周期光学超晶格来为中性原子或分子产生高通量合成磁场的全光学方法。调制为产生两个频率的单个激光源足以产生具有拓扑Floquet能带的动态调制干涉图案。特别是，我们提出了一个简单的激光装置，实现了紧束缚模型与均匀的通量每个plaquette和良好分离的陈带。我们的方法只依赖于粒子的标量极化率和远失谐光。
英文摘要：
We introduce an all-optical approach to producing high-flux synthetic magnetic fields for neutral atoms or molecules by designing intrinsically time-periodic optical superlattices. A single laser source, modulated to generate two frequencies, suffices to create dynamically modulated interference patterns which have topological Floquet energy bands. In particular, we propose a simple laser setup that realizes a tight-binding model with uniform flux per plaquette and well-separated Chern bands. Our method relies only on the particles' scalar polarizability and far detuned light.
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