论文标题
拓扑光学晶格梯子中增强的排斥性原子对
Enhanced repulsively bound atom pairs in topological optical lattice ladders
论文作者
论文摘要
人们对使用冷原子系统探索拓扑带结构中强相互作用的影响越来越有兴趣。在这里，我们研究了在Cruetz梯子中的相互作用玻色子，该玻色子的特征是拓扑平坦的能带，其中提出相互作用会导致结合原子对的形成，从而产生成对的超流体。通过研究现实的实验实现，我们了解晶格拓扑如何增强结合对的性能，从而在这些系统中产生相对较大的有效的成对调节，从而导致稳健的成对超流体，并且我们发现只涉及对的晶格超莫利德相。我们通过时间依赖性参数变化来确定用于制备这些相的方案，并查看在晶格中检测和表征这些系统的方法。这项工作为研究了拓扑，相互作用和对更通用系统配对的影响之间的相互作用提供了一个起点，并与拓扑材料的量子模拟的潜在联系。
There is a growing interest in using cold-atom systems to explore the effects of strong interactions in topological band structures. Here we investigate interacting bosons in a Cruetz ladder, which is characterised by topological flat energy bands where it has been proposed that interactions can lead to the formation of bound atomic pairs giving rise to pair superfluidity. By investigating realistic experimental implementations, we understand how the lattice topology enhances the properties of bound pairs giving rise to relatively large effective pair-tunnelling in these systems which can lead to robust pair superfluidity, and we find lattice supersolid phases involving only pairs. We identify schemes for preparation of these phases via time-dependent parameter variation and look at ways to detect and characterise these systems in a lattice. This work provides a starting point for investigating the interplay between the effects of topology, interactions and pairing in more general systems, with potential future connections to quantum simulation of topological materials.
