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 gener...

中文翻译：

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拓扑光学晶格梯中增强的排斥原子对

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引起人们的兴趣。在这里，我们研究了Cruetz梯子中相互作用的玻色子，其特征是拓扑平坦的能带，其中有人提出相互作用可以导致束缚原子对的形成，从而引起成对的超流体。通过研究实际的实验实现，我们了解了晶格拓扑结构如何增强绑定对的属性，从而在这些系统中产生了相对较大的有效对-簇簇现象，这可能导致强大的对超流动性，并且我们发现仅涉及对的晶格超固相。我们确定了通过与时间有关的参数变化来准备这些阶段的方案，并研究了检测和表征晶格中这些系统的方法。