Probing multi-mobility edges in quasiperiodic mosaic lattices  

在准周期马赛克晶格中探测多个迁移边界

作　　者：Jun Gao Ivan M.Khaymovich Xiao-Wei Wang Ze-Sheng Xu Adrian Iovan Govind Krishna Jiayidaer Jieensi Andrea Cataldo Alexander V.Balatsky Val Zwiller Ali W.Elshaari 高俊;Ivan M.Khaymovich;王潇卫;徐泽生;Adrian Iovan;Govind Krishna;Jiayidaer Jieensi;Andrea Cataldo;Alexander V.Balatsky;Val Zwiller;Ali W.Elshaari

机构地区：[1]Department of Applied Physics,KTH Royal Institute of Technology,Albanova University Centre,Stockholm SE-10691,Sweden [2]Nordita,Stockholm University and KTH Royal Institute of Technology,Stockholm SE-10691,Sweden [3]Institute for Physics of Microstructures,Russian Academy of Sciences,Nizhny Novgorod 603950,Russia [4]Center for Integrated Quantum Information Technologies(IQIT),School of Physics and Astronomy and State Key Laboratory of Advanced Optical Communication Systems and Networks,Shanghai Jiao Tong University,Shanghai 200240,China [5]Department of Physics,University of Connecticut,Storrs,Connecticut 06269,USA

出　　处：《Science Bulletin》2025年第1期58-63,共6页科学通报(英文版)

基　　金：support from Swedish Research Council(2023-06671 and 2023-05288);Vinnova project(2024-00466);the G?ran Gustafsson Foundation;support from Knut and Alice Wallenberg(KAW)Foundation through the Wallenberg Centre for Quantum Technology(WACQT);Swedish Research Council(VR)Starting Grant(2016-03905);Vinnova quantum kick-start project 2021;support from the KAW and VR;supported by European Research Council under the European Union Seventh Framework ERS-2018-SYG HERO,KAW 2019.0068;the University of Connecticut。

摘　　要：The mobility edge(ME)is a crucial concept in understanding localization physics,marking the critical transition between extended and localized states in the energy spectrum.Anderson localization scaling theory predicts the absence of ME in lower dimensional systems.Hence,the search for exact MEs,particularly for single particles in lower dimensions,has recently garnered significant interest in both theoretical and experimental studies,resulting in notable progress.However,several open questions remain,including the possibility of a single system exhibiting multiple MEs and the continual existence of extended states,even within the strong disorder domain.Here,we provide experimental evidence to address these questions by utilizing a quasiperiodic mosaic lattice with meticulously designed nanophotonic circuits.Our observations demonstrate the coexistence of both extended and localized states in lattices with broken duality symmetry and varying modulation periods.By single-site injection and scanning the disorder level,we could approximately probe the ME of the modulated lattice.These results corroborate recent theoretical predictions,introduce a new avenue for investigating ME physics,and offer inspiration for further exploration of ME physics in the quantum regime using hybrid integrated photonic devices.

关 键 词：Mobility edge Localization physics Mosaic lattice NANOPHOTONICS 

分 类 号：O73[理学—晶体学]