主讲人：高超，浙江师范大学教授
时 间：2025年11月26日 10:00
地 点：物电学院A栋414
联系人: 李福祥
讲座摘要：Recent advances in spin-dependent optical lattices have enabled the experimental implementation of two superimposed 2D lattices, presenting new opportunities to investigate twistronics in 3D with ultracold atomic gases. In this talk, I will present our recent results on the moiré physics of atoms within a spin-dependent cubic lattice with relative twists along different directions. It is discovered that dimensionality play a vital role, effecting both periodic and quasi-periodic case. (1) For periodic case, we find that the synthetic system present symmetries different to the composing lattices. We then systematically classified the crystal structure. Further we find that the composite twist lattices can support exotic topological nodal line or nodal point structures. (2) For quasi-periodic case, we develop a low-energy effective theory applicable to systems with arbitrary rotation axes and small rotation angles. This theory elucidates the emergence of quasi-periodicity in 3D. Numerical analyses reveal that these quasi-periodic moiré potentials can lead to distinctive dimensional localization behaviors of atoms, manifesting as localized wave functions in planar or linear configurations.
主讲人简介：高超，浙江师范大学教授。2010年毕业于北京师范大学并获得物理学学士学位；2015年毕业于清华大学高等研究院并获得物理学博士学位。主要从事超冷原子气体物理与量子模拟的研究，迄今发表SCI论文21篇，含2篇ESI高被引，5篇见刊于物理学顶刊Physical Review X/Letters，1篇合作成果发表于Nature主刊。其研究工作系统性揭示了对称性约束下的量子新规律，诠释了剑桥大学、巴黎高师等顶尖实验组观测到的新奇量子现象；解析方法被学界命名为史高翟映射并载入专著；三维莫尔物理理论获美国物理学会《物理》期刊专题评述。主持了国家自然科学基金青年基金（B类）项目等国家级项目，入选首批浙江省高校领军人才计划并获得浙江省自然科学基金杰出青年项目。
