Observation of a symmetry-protected topological phase of interacting bosons with Rydberg atoms
Observation of a symmetry-protected topological phase of interacting bosons with Rydberg atoms
复制标题
DOI：
10.1126/science.aav9105
复制
发表时间：
2019-08-23
期刊：
影响因子：
56.9
通讯作者：
Browaeys, Antoine
中科院分区：
文献类型：
--
作者：
de Leseleuc, Sylvain;Lienhard, Vincent;Browaeys, Antoine
拓扑相的概念是描述量子多体系统基态的一个强有力的框架，超越了对称破缺的范式。拓扑相可以自然地出现在凝聚态系统中，而在人工物质中实现和研究这种量子多体基态需要仔细的工程设计。在这里，我们报告了在一维晶格中相互作用的玻色子的对称保护拓扑相的实验实现，并证明了归因于受保护的零能量边缘态的鲁棒基态简并。实验装置是基于原子被困在光镊阵列中并被激发到里德伯能级，这产生了由偶极交换相互作用产生的有效跳变的硬核玻色子。
The concept of topological phases is a powerful framework for characterizing ground states of quantum many-body systems that goes beyond the paradigm of symmetry breaking. Topological phases can appear in condensed-matter systems naturally, whereas the implementation and study of such quantum many-body ground states in artificial matter require careful engineering. Here, we report the experimental realization of a symmetry-protected topological phase of interacting bosons in a one-dimensional lattice and demonstrate a robust ground state degeneracy attributed to protected zero-energy edge states. The experimental setup is based on atoms trapped in an array of optical tweezers and excited into Rydberg levels, which gives rise to hard-core bosons with an effective hopping generated by dipolar exchange interaction.