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arXiv 2006.07112cond-mat.quant-gasquant-ph
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拓扑光晶格梯中排斥束缚原子对的增强

Enhanced repulsively bound atom pairs in topological optical lattice ladders

Stuart Flannigan, Andrew J. Daley

摘要:

利用冷原子系统来研究强相互作用对拓扑能带结构的影响越来越受到人们的关注。在这里,我们调查相互作用的玻色子在克鲁茨阶梯,其特征在于拓扑平坦的能带,它已被提出,相互作用可以导致形成绑定原子对引起对超流。通过调查现实的实验实现,我们了解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相对较大的有效对隧穿,这可能会导致强大的对超流性,我们发现晶格超固相只涉及对。我们确定这些阶段的准备方案,通过随时间变化的参数,并期待在晶格中检测和检测这些系统的方法。这项工作提供了一个起点,调查拓扑结构,相互作用和配对在更一般的系统中的影响之间的相互作用,与潜在的未来连接到拓扑材料的量子模拟。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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