论文标题
多层光学晶格的逐层组装：应用于位移骰子晶格
Layer-by-layer assembly of multilayer optical lattices: Application to displaced dice lattice
论文作者
论文摘要
我们提出了以逐层方式合成冷原子的多层光学晶格的方法，以释放光学晶格在模拟多层系统的引人入胜的物理学方面的潜力。该方法的核心是压缩带有两个圆柱透镜的望远镜的红色连续激光束的光束轮廓从磁盘状到细线。高度可调的多层光学晶格是通过通过由梁拆分器，镜子和玻璃板组成的光学设备传递压缩高斯束来获得的。我们用流离失所的骰子晶格说明了该提案，这是一个三层晶格，当投影到同一层时，它映射到骰子晶格。骰子模型及其有趣的变体都可以实现。对于一个典型的冷冷原子模型，具有两个色散带之间的孤立平坦带，我们发现涉及平面带的山谷对抗的频带间过渡。
We propose methods for synthesizing multilayer optical lattices of cold atoms in a layer-by-layer manner, to unlock the potential of optical lattices in simulating the fascinating physics of multilayer systems. Central to the approach is to compress the beam profile of a red-detuned Gaussian laser beam from disklike to a thin line by a telescope with two cylindrical lenses. A highly tunable multilayer optical lattice is obtained by passing the compressed Gaussian beam through an optical device consisting of beam splitters, mirrors, and glass plates. We illustrate the proposal with the displaced dice lattice, which is a trilayer lattice that maps to the dice lattice when projected to the same layer. Both the dice model and its interesting variants may be realized. For a model of fermionic cold atoms, featuring an isolated flat band between two dispersive bands, we find valley-contrasting interband transitions involving the flat band.
