Ultracold-molecule higher-order topological phases induced by long-range dipolar interactions in optical-tweezer lattices
Jinzhu Jiang, Zhonghua Ji, Feng Mei +3 more
Ultracold atomic and molecular systems in the past years have significantly advanced the exploration of topological phases of matter. Notably, the recent experimental progress achieved in ultracold molecules, particularly within optical-tweezer lattices and leveraging long-range dipolar interactions, has opened up new avenues for this prospect. Here, we propose the creation of an ultracold-molecule trimerized Kagome optical-tweezer lattice to examine the topological phases induced by long-range dipolar interactions. Through a comparison of topological features in scenarios with and without long-range couplings, we find that the long-range interactions can induce higher-order topological phases with diverse topological corner modes at each corner, a phenomenon that can even emerge in nonstandard trimerized Kagome lattices. Furthermore, we develop a dynamic method to spectrally and spatially detect these topological corner modes. Our research not only underscores that long-range interactions can engender much richer topological phases but also suggests exciting possibilities for designing reconfigurable topological lattices.
Physical Review A•Jul 11, 2024•3 citations