Floquet engineering of a dynamical Z2 lattice gauge field with ultracold atoms  

作　　者：Xiangxiang Sun Hao-Yue Qi Pengfei Zhang Wei Zheng 孙祥祥;齐浩月;张鹏飞;郑炜(Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China;CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China;Department of Physics,Fudan University,Shanghai 200438,China;Shanghai Qi Zhi Institute,AI Tower,Xuhui District,Shanghai 200232,China;Hefei National Laboratory,Hefei 230088,China)

机构地区：[1]Hefei National Laboratory for Physical Sciences at the Microscale and Department of Modern Physics,University of Science and Technology of China,Hefei 230026,China [2]CAS Center for Excellence in Quantum Information and Quantum Physics,University of Science and Technology of China,Hefei 230026,China [3]Department of Physics,Fudan University,Shanghai 200438,China [4]Shanghai Qi Zhi Institute,AI Tower,Xuhui District,Shanghai 200232,China [5]Hefei National Laboratory,Hefei 230088,China

出　　处：《Chinese Physics B》2024年第11期193-199,共7页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.GG2030007011(WZ),GG203004045(WZ),12374477(PZ));Innovation Program for Quantum Science and Technology(Grant No.2021ZD0302004(WZ))。

摘　　要：Gauge field theory is a fundamental concept in modern physics,attracting many theoretical and experimental efforts towards its simulation.In this paper we propose that a simple model,in which fermions coupled to a dynamical lattice gauge field,can be engineered via the Floquet approach.The model possesses both an independent Maxwell term and local Z_(2) gauge symmetry.Our proposal relies on a species-dependent optical lattice,and can be achieved in one,two or three dimensions.By a unitary transformation,this model can be mapped into a non-interacting composite fermion system with fluctuating background charge.With the help of this composite fermion picture,two characteristic observations are predicted.One is radio-frequency spectroscopy,which exhibits no dispersion in all parameter regimes.The second is dynamical localization,which depends on the structure of the initial states.

关 键 词：gauge theory quantum simulations 

分 类 号：O413[理学—理论物理]