气候变化领域集成服务门户(CCPortal): Observation of topological phase with critical localization in a quasi-periodic lattice

CCPortal

DOI	10.1016/j.scib.2021.07.025
	Observation of topological phase with critical localization in a quasi-periodic lattice
	Xiao T.; Xie D.; Dong Z.; Chen T.; Yi W.; Yan B.
发表日期	2021
ISSN	20959273
英文摘要	Disorder and localization have dramatic influence on the topological properties of a quantum system. While strong disorder can close the band gap thus depriving topological materials of topological features, disorder may also induce topology from trivial band structures, wherein topological invariants are shared by completely localized states. Here we experimentally investigate a fundamentally distinct scenario where topology is identified in a critically localized regime, with eigenstates neither fully extended nor completely localized. Adopting the technique of momentum-lattice engineering for ultracold atoms, we implement a one-dimensional, generalized Aubry-André model with both diagonal and off-diagonal quasi-periodic disorder in momentum space, and characterize its localization and topological properties through dynamic observables. We then demonstrate the impact of interactions on the critically localized topological state, as a first experimental endeavor toward the clarification of many-body critical phase, the critical analogue of the many-body localized state. © 2021 Science China Press
关键词	Critical localization Momentum lattice Quantum simulation Topological phase
英文关键词	Energy gap; Quantum chemistry; Quantum optics; Topology; Critical localization; Localisation; Localised; Localized state; Many body; Momentum lattice; Quantum simulations; Quasi-periodic lattices; Topological phase; Topological properties; Momentum
语种	英语
来源期刊	Science Bulletin
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/207620
作者单位	Interdisciplinary Center of Quantum Information, State Key Laboratory of Modern Optical Instrumentation and Zhejiang Province Key Laboratory of Quantum Technology and Device of Physics Department, Zhejiang University, Hangzhou, 310027, China; CAS Key Laboratory of Quantum Information, University of Science and Technology of China, Hefei, 230026, China; CAS Center For Excellence in Quantum Information and Quantum Physics, Hefei, 230026, China; Collaborative Innovation Centre of Advanced Microstructures, Nanjing University, Nanjing, 210093, China
推荐引用方式 GB/T 7714	Xiao T.,Xie D.,Dong Z.,et al. Observation of topological phase with critical localization in a quasi-periodic lattice[J],2021.
APA	Xiao T.,Xie D.,Dong Z.,Chen T.,Yi W.,&Yan B..(2021).Observation of topological phase with critical localization in a quasi-periodic lattice.Science Bulletin.
MLA	Xiao T.,et al."Observation of topological phase with critical localization in a quasi-periodic lattice".Science Bulletin (2021).