Observation of flat-band localized state in a one-dimensional diamond momentum lattice of ultracold atoms

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外文摘要：We investigated the one-dimensional diamond ladder in the momentum lattice platform.By inducing multiple two-and four-photon Bragg scatterings among specific momentum states,we achieved a flat band system based on the diamond model,precisely controlling the coupling strength and phase between individual lattice sites.Utilizing two lattice sites cou-plings,we generated a compact localized state associated with the flat band,which remained localized throughout the entire time evolution.We successfully realized the continuous shift of flat bands by adjusting the corresponding nearest neighbor hopping strength,enabling us to observe the complete localization process.This opens avenues for further exploration of more complex properties within flat-band systems,including investigating the robustness of flat-band localized states in disordered flat-band systems and exploring many-body localization in interacting flat-band systems.

外文关键词：

diamond latticeflat bandmomentum latticelocalized state

作者：

曾超、石悦然、毛一屹、武菲菲、谢岩骏、苑涛、戴汉宁、陈宇翱

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作者单位：

Hefei National Research Center for Physical Sciences at the Microscale and School of Physical Sciences,University of Science and Technology of China,Hefei 230026,China

Shanghai Research Center for Quantum Sciences and CAS Center for Excellence Quantum Information and Quantum Physics,University of Science and Technology of China,Shanghai 201315,China

Hefei National Laboratory,University of Science and Technology of China,Hefei 230088,China

Department of Physics,Renmin University of China,Beijing 100872,China

Key Laboratory of Quantum State Constructuion and Manipulation(Ministry of Education),Renmin University of China,Beijing 100872,China

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基金：

National Natural Science Foundation of ChinaAnhui Initiative in Quantum Information Technologies,the National Key Research and Development Program of ChinaShanghai Municipal Science and Technology Major ProjectStrategic Priority Research Program of Chinese Academy of SciencesInnovation Program for Quantum Science and TechnologyNew Cornerstone Science Foundation

项目编号：

120743672020YFA03098042019SHZDZX01XDB350202002021ZD0302002

出版年：

2024

DOI：

10.1088/1674-1056/ad0cd1

中国物理B(英文版)

中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI

影响因子：0.995

ISSN：1674-1056

年,卷(期)：2024.33(1)

参考文献量33